-> ''"I thought that the business, the industry, the presentation needed to change in the same way that music had changed, because music was all about Music/{{Poison}} and Music/MotleyCrue and Music/{{Winger}} and all these [[HairMetal hair bands]], and then along came Music/{{Nirvana}}, and '''BAM!''' The whole industry changed. So in the same way, I thought wrestling needed to change, in that wrestling had become the equivalent of hair bands, and we needed wrestling's version of Nirvana to come along and just shake everything up."''
-->-- '''PaulHeyman''', ''The Rise and Fall of ECW''

While a WhamEpisode can change a single series forever... sometimes, something comes out that permanently alters an entire genre. It wasn't the first entry into the genre, nor was it the last, but things were never the same after it came out. This often -- but far from exclusively -- happens with particularly notable {{Deconstruction}}s; once one story has pointed how a certain genre will play out ''in reality'' this can cause a ripple effect across other stories in the genre. However, it doesn't always have to be a Deconstruction. Some shows can radically redefine a genre without taking it apart. {{Reconstruction}}s can have the same effect; incorporating ''realistic'' elements into the old-school storytelling can make the genre look new again.

Compare WhamEpisode, GenreKiller, FromClonesToGenre, FollowTheLeader. Good chance of being a {{Trope Maker|s}} or TropeCodifier.


* The HaremGenre was invented by ''Manga/UruseiYatsura'', but was ''re-invented by Anime/TenchiMuyo'', which refined and popularized the "harem anime" formula (ordinary guy lives with a bunch of attractive, quirky girls). In addition to the episodic plots it had longer story arcs and a protagonist one would want to ''root for'' instead of smack. Six years later, ''Love Hina'' further tweaked the formula by dropping the action/fantasy elements of ''Tenchi'' in favor of a straight-up romantic comedy, making TheProtagonist more of a sadsack, upping the wacky hijinks and setting new rules for the genre: namely, an UnluckyEverydude male protagonist who lives with a bunch of girls (the {{Tsundere}}, the HardDrinkingPartyGirl, the {{Ojou}} with the HimeCut, the ShrinkingViolet and the Exotic Foreign Girl) who all fall in love with him simply because [[SingleWomanSeeksGoodMan he's a nice and sensitive guy]], with the gaps in the plot smoothed over with dollops of fanservice. Almost every harem series since has followed its lead. Haters of this cannot forgive Ken Akamatsu.
* It was [[MenDontCry NOT okay for men to cry]] in anime before ''Manga/FistOfTheNorthStar''. Afterwards, however, tears became a symbol of [[ManlyTears honorable masculinity]] tempered by [[TenderTears a kind and gentle heart.]]
* The original ''Anime/MobileSuitGundam'' revamped the HumongousMecha genre, single-handedly invented most RealRobot plot devices, and, along the way, ushered the {{Otaku}} subculture into existence (though to be fair, other shows helped it in the latter).
* And before that ''Anime/MazingerZ'' is generally credited with changing HumongousMecha as piloted craft as opposed to something controlled by TheKidWithTheRemoteControl. It's near contemporary ''Manga/GetterRobo'' added the CombiningMecha to the mix.
* ''VisualNovel/YamiToBoushiToHonNoTabibito'' and ''Manga/KannazukiNoMiko'' showed that {{Yuri|Genre}} anime could be profitable; ''Anime/{{Simoun}}'' showed that it could be TrueArt.
* ''Manga/{{Akira}}''. Before it came out, it was distressingly common to see anime films and shows targeted toward older audiences horribly {{Macekre}}d so they could fit into the AnimationAgeGhetto. After it came out, people in the West finally got the idea that anime movies didn't have to be targeted towards kids at all. Ironically, ''Akira'' was released by Macek's Streamline Pictures studio.
* The effect ''Anime/NeonGenesisEvangelion'' had on the [[MechaShow mecha genre]] was similar to the effect a hammer has on an egg. It was the first giant robot show based around the concept that being a [[OrdinaryHighSchoolStudent naive teenager]] [[FallingIntoTheCockpit thrown into the cockpit]] of a [[HumongousMecha massively powerful war machine]] and forced to fight [[{{Kaiju}} titanic alien invaders]] to save humanity would ''really suck.''
* ''Manga/DragonBall''. The series introduced and/or codified many {{Shonen|Demographic}} tropes such as the innocent IdiotHero with a large appetite, the TournamentArc, etc. Its influence can be seen in many different anime and manga series to this day.
* ''Manga/SailorMoon'' made the MagicalGirl genre switch from the CuteWitch type to the MagicalGirlWarrior type, as well as mash in elements of {{Sentai}} that persist in the genre to this day.

* The Ford Model T turned the automobile from a luxury toy into a necessity, putting millions of Americans on the road and creating an entire industry thanks to Ford's innovative use of the assembly line.
** The Volkswagen Type 1 "Beetle" in Germany, the Fiat 500 in Italy, the Citroën 2CV in France, and the Subaru 360 in Japan did much the same in their respective countries after UsefulNotes/WorldWarII.
* The Mini was not only the first commercially successful front-wheel-drive car, it started a revolution in the use of interior space in automobiles, with its ability to seat a family of four comfortably despite its, well, [[ExactlyWhatItSaysOnTheTin minuscule]] size thanks to how all the parts were arranged to maximize the room inside. Nearly every compact car built since then bears some of the Mini's DNA.
* [[RuleOfCautiousEditingJudgment While we could go back and forth about the accuracy]] of Ralph Nader's 1965 book ''Unsafe at Any Speed'' for days on end, the fact still stands that the public's reaction to it forced automakers to start seriously considering the safety of their cars. In its wake, a host of new safety features, most notably seat belts, airbags, and the "Nader bolt" on car doors, began popping up in new cars, some of them mandated by law, while chrome plating (which produced blinding glare) and "suicide doors" (so name because they made it easy to be thrown out of the car in a crash) all but vanished.
* When the 1973 gas crisis hit the United States, the Detroit automakers were caught completely off-guard with their lineup of large, gas-guzzling sedans and muscle cars that few people wanted to buy anymore, while the Japanese companies that had been selling tiny, fuel-sipping econoboxes suddenly saw booming business. The history of the automobile in America can roughly be divided into "pre-1973" and "post-1973", such was the impact of the gas crisis: the Japanese became major players in the American auto market, Detroit correspondingly fell into a decade-long DorkAge, a flurry of new regulations on fuel economy and emissions emerged, and big gas-guzzlers became DeaderThanDisco for a generation until the rise of the SUV in the '90s.
* The Plymouth Voyager, Horizon, and Reliant and their respective Dodge stablemates, the Caravan, Omni, and Aries, were the vehicles that saved Chrysler. Teetering on the edge of bankruptcy in the early '80s and only kept afloat by a government bailout, these vehicles turned the company around overnight. The Horizon/Omni hatchbacks and Reliant/Aries compacts proved that American automakers could build small cars that could compete with the Japanese, vanquishing the legacy of crap like the Chevrolet Vega, the AMC Pacer, and especially Chrysler's old Dodge Aspen and Plymouth Volaré. (The [[TheAllegedCar terrible build quality]] of those two cars forced Chrysler to shell out millions to repair cars under warranty, playing a large role in bringing the company to the brink in the first place.) The Voyager and Caravan, meanwhile, pioneered an entirely new type of vehicle, the "minivan" that had the cargo space of a station wagon but far superior fuel economy. Chrysler CEO Lee Iacocca became a national icon for turning Chrysler around, with many attempts to get him to run for President.
* In Europe, the Renault Espace came out around the same time as the Voyager/Caravan, and played a similar role in popularizing the minivan (or as it's known in Europe, the multi-purpose vehicle, or MPV) there. The Espace was actually designed at Chrysler's European subsidiary in the late '70s, but there seems to have been no contact between the designers of the two vehicles -- they both found a good idea independently.
* The Ford Explorer brought back the old-fashioned landyacht automobile in a new, truck-inspired form. While the idea of combining a station wagon with a truck was an old concept, many of those older vehicles (such as the Ford Bronco and Jeep Cherokee) hewed much closer to the "truck" side of the equation, with their interiors being fairly spartan and, essentially, covered truck beds. The Explorer, however, turned that combination into a money-spinning machine by adding car-like creature comforts that many earlier takes on the concept lacked, making it a viable choice for suburban families. Conventional station wagons and large family sedans essentially died out in the '90s and '00s thanks to the rise of what came to be known as sport-utility vehicles, or [=SUVs=].
** Ironically, the Explorer itself would see its reputation [[DeaderThanDisco irrevocably tarnished]] by a rollover scandal involving Firestone tires, leading to the collapse of its own sales just as the [=SUVs=] it inspired (including Ford's own Expedition and Excursion, both of which [[HummerDinger made the Explorer look like a tiny clown car]]) were taking over the road. And in another irony, the Explorer since 2011 has been a crossover utility vehicle -- the very sort of vehicle that killed the style of [=SUVs=] that the Explorer had popularized, taking their niche in the American market.
* The impact of the SUV's combination of power and luxury eventually trickled back to pickup trucks themselves. The second-generation Dodge Ram that debuted in 1994 proved that trucks could be more than just workhorses -- they could look good and be nice to drive as much as any car or SUV. From there, the development of pickups and [=SUVs=] went hand-in-hand, and smaller work trucks like the Ford Ranger and the Chevrolet S-10 fell by the wayside as pickups followed [=SUVs=] in becoming lifestyle vehicles. Indeed, some have blamed the Ram for, in the long run, making trucks too expensive for the average blue-collar contractor or farmer (the original market for pickup trucks) to purchase new.

[[folder:Comic Books]]
* An example that isn't actually a "work." The outrage caused by the book ''Seduction of the Innocent'' led to the creation of UsefulNotes/TheComicsCode. This killed horror and crime comics, then among the biggest hits for the industry, while saving the superhero genre, which was sinking at the time. This also led Creator/MarvelComics to give Creator/StanLee and Creator/JackKirby the green light to experiment, as they were hurting in the wake of this turn in the medium. (Which in turn led to the Marvel Age.) All of this led to the terms "comic book character" and "superhero" being almost interchangeable in the North American market.
* {{The Silver Age|OfComicBooks}} changed superhero comics forever. It introduced more flawed and relatable characters, more sophisticated themes, and more complicated plots. This led to an eventual shift in the target audience for comics from children to late teens/young adults.
** It is generally accepted that [[Franchise/TheFlash Barry Allen, the second Flash]], was the character that kicked off the Silver Age, complete with sleek, form-fitting, cape-less costume, more [[ScienceMarchesOn scientific...ish]]...origin, and a RoguesGallery of gimmick villains.
** ''Franchise/SpiderMan'' broke the mold as a teen superhero who was not a sidekick and had no mentor or guide, so that the first thing he thinks to do with his powers is make money. (Okay, so ComicBook/PlasticMan started out as a thief, but Spider-Man still had a huge impact on the genre.)
** ''Comicbook/FantasticFour'' introduced a family team where the members clash and bicker from time to time. Also, The Thing pioneered the idea of a superhero who [[CursedWithAwesome viewed his powers as a curse]].
** ''Comicbook/IncredibleHulk'' got a lot of attention as an ambiguous hero who wasn't really a superhero or a monster, but rather something in between. He was also a counter culture symbol in his early days.
* Creator/JackKirby's move to DC. The Comicbook/NewGods is often considered the beginning of UsefulNotes/{{the Bronze Age|OfComicBooks}}.
* ''ComicBook/{{Watchmen}}'' and ''Comicbook/BatmanTheDarkKnightReturns'' more or less ushered in TheDarkAgeOfComicBooks. ''ComicBook/KingdomCome'', in turn, would end it.
* ''ComicStrip/{{Peanuts}}'' changed NewspaperComics permanently. It gave strips the license to address deep and (sometimes) dark issues and not just be simple gag-a-day escapism. However, Charles Schulz's signature simple artwork gave newspapers the idea to reduce the size of the comic panels and force all the future artists to simplify their artwork to the point where all the art look like rushed cut-and-paste jobs. Again with ''ComicStrip/CalvinAndHobbes'', which carried the intelligent and philosophical underpinnings of Peanuts forward while marking the beginning of the pushback against the "Schulzian" artistic simplification.
* Harvey Pekar's ''ComicBook/AmericanSplendor'' showed that comics could depict adult life without idealizing it.
* ''ComicBook/TheAdventuresOfLutherArkwright'' was an independent New Wave style ScienceFiction comic made by Creator/BryanTalbot in the 70s, the techniques and story telling he used have had large impact on many other writers and artists. Creator/WarrenEllis has said "LUTHER ARKWRIGHT invented the tools. ARKWRIGHT informs Alan Moore, Grant Morrison, Creator/NeilGaiman, Creator/GarthEnnis, me, and all the rest of us. It's probably Anglophone comics' single most important experimental work."
%%* ''ComicBook/TwoThousandAD'' started in 1977 and has been the most popular British comic of the past few decades, granted it's faded a bit but it was the starting place for influential creators like Creator/AlanMoore and Creator/GrantMorrison.
%%** More than just them, too. Chances are if there's a significant British creator from the last 30 years, he's almost certainly done something for 2000AD, even if it was just a one-shot Future Shock.
* Creator/AlanMoore starts writing Comicbook/SwampThing. From one writer no one in America had heard of on a dying third-string title at DC we eventually got the whole of Creator/VertigoComics, Marvel's Max Imprint and not a few smaller publishing houses (Avatar, for example).
* Creator/ChrisClaremont starts writing the ''Comicbook/XMen''. Creator/MarvelComics had been soap operas before that point, but Claremont's writing made the soap truly operatic in scope. Mainstream modern superhero comics, including the deconstructions of Creator/AlanMoore and others, were changed forever by the popularity of Claremont's writing style. (Yes, Byrne's art had something to do with it too, but Claremont stayed on the title a lot longer and had a lot more influence.)

[[folder:Fan Works]]
* "A Fragment out of Time", published in ''Spockanalia'' (a Franchise/StarTrek fanzine running through the seventies), was the first known SlashFic to hit wide distribution. Virtually ''every'' YaoiFangirl can thank Diane Marchant, who originally published anonymously.

[[folder:Film (Animated)]]
* ''Disney/SnowWhiteAndTheSevenDwarfs'' showed that not only can animation be entertaining and longer than 5 minutes, but that the audience can be emotionally connected with animated characters. ''Disney/TheLittleMermaid'' was a surprise sensation in 1989, revitalizing interest in animated features. For years afterward, its musical fantasy structure was the default setting for Western animated features. It was eventually overtaken by the Creator/{{Pixar}} CGI boom, but arguably no CGI film has had the kind of positive impact on the entire genre that ''Mermaid'' did.
* ''WesternAnimation/{{Shrek}}'' ushered in a period of {{Deconstruction}} for fairy tales, resulting in {{Fractured Fairy Tale}}s such as ''Film/{{Enchanted}}'', ''WesternAnimation/HappilyNEverAfter'', and ''WesternAnimation/{{Hoodwinked}}''. The genre later began {{Reconstruction}}, with ''WesternAnimation/TheTaleOfDespereaux'', ''Disney/ThePrincessAndTheFrog'', and ''Disney/{{Tangled}}''. ''Shrek'' is also blamed by fans of traditional animation for [[GenreKiller ending the dominance of traditional animation]] and bringing about the rise of {{All CGI Cartoon}}s laden with [[ShoutOut pop cultural references]] [[UnintentionalPeriodPiece that would become dated within months]], an over-reliance on ToiletHumour, overuse of ParentalBonus and GettingCrapPastTheRadar to the point where it gets annoying, and gratuitous celebrity casting. Granted, Creator/WarnerBros had done pop cultural references [[OlderThanTheyThink back in]] TheGoldenAgeOfAnimation, Franchise/{{Disney|AnimatedCanon}} has been [[CelebrityVoiceActor casting big name celebrities]] in their films since ''Disney/{{Pinocchio}}'', and pretty much ''every'' animation studio has slipped crap past the radar in their films, but ''Shrek'' and [[WesternAnimation/SharkTale similar]] [[WesternAnimation/{{Madagascar}} movies]] are the culmination of these trends, for better or for worse.
* ''WesternAnimation/ToyStory'' (1995) spawned the entire [[AllCGICartoon CG boom in animation]], which eventually took over Western animated film.
** ''Toy Story'' was also the major turning point for celebrity voice casting as a major selling point. Bringing in celebrities to do voices was not new, but such roles were usually typecast. ''Toy Story'' featured two main voices that really weren't bringing anything special to the table (in contrast to far more notable voices like, say Vincent Price brought to a villainous role, or Paul Lynde to a sneaky role), but were marketed as a big thing.

[[folder:Film (Live-Action)]]
* ''Film/HeavensGate'', although not for the same reasons as most of the other examples: it was so bad, it [[GenreKiller killed]] the [[TheWestern Hollywood Western]] (at least for a time), [[CreatorKiller United Artists as an independent studio, and director Michael Cimino's career]]. It and other high-profile flops (''One From the Heart'', ''Sorcerer'') also killed the [[NewHollywood auteur period]] in Hollywood.
* Creator/WesCraven made ''Film/{{Scream 1996}}'' in an effort to kill the SlasherMovie once and for all. [[SpringtimeForHitler It did the exact opposite]], [[PopularityPolynomial breathing new life]] into a once-dying genre and starting the late '90s/early '00s PostModernism craze in horror.
* Before that, ''Film/{{Halloween 1978}}'' started the modern slasher genre. Two years later, ''Film/FridayThe13th1980'' turned the slasher flick into a {{horror}} staple by focusing on the exploitation part of it.
* ''Film/DieHard'' did this for the action movie. Sure, there were smart thrillers with smart villains beforehand -- ''Film/DieHard'' itself could be seen as something of a remake of ''Film/NorthSeaHijack'' -- but after it came out, there were far fewer action films that featured invincible, unstoppable heroes (Schwarzenegger, Stallone) whose plots depended entirely on {{Ass Pull}}ing solutions out of thin air than there were before. Plus, not many films rewrite the rules for the genre so heavily that an [[DieHardOnAnX entire subgenre]] forms around them.
* A decade later, ''Film/TheMatrix'' did the same thing, introducing mainstream Western audiences to [[HeroicBloodshed Hong Kong-style gunplay]], fight choreography living up to Asian action film standards of sophistication, and [[TropeCodifier codifying]] the use of BulletTime.
* And just a few years after that, ''[[Film/TheBourneSeries The Bourne Identity]]'' took action movies in the other direction, filling them with grit and stripping them down to basics in a seeming backlash against the over-the-top style of ''Film/TheMatrix''. It also took cinematic SpyFiction away from the flashy, over-the-top "[[TuxedoAndMartini Martini]]" style seen in the Creator/PierceBrosnan [[Film/JamesBond Bond]] films and more in a "[[DarkerAndEdgier Stale Beer]]" direction, to the point where even [[Film/CasinoRoyale later]] [[Film/QuantumOfSolace Bond films]] followed its lead.
* ''Film/ForbiddenPlanet'' was the film that revolutionized film and television science fiction.
* Creator/SergioLeone's Film/DollarsTrilogy. These films weren't the first {{deconstruction}}ist [[TheWestern Westerns]] -- the classics ''Film/HighNoon'' and ''Film/TheSearchers'' came out a decade before them -- but they left a far more lasting impact on the genre than those two films did. All of a sudden, the BlackAndWhiteMorality that was nearly omnipresent in the genre vanished, replaced with the grittier, more morally gray attitudes seen in such films as ''Film/TheWildBunch'', ''Film/HighPlainsDrifter'' and, much later, ''Film/{{Unforgiven}}''. Every single Western made since the mid-'60s owes something to Leone's masterpiece.
* ''Franchise/StarWars''. While ''Film/{{Jaws}}'' is usually regarded as the first modern "blockbuster" movie, this was the one that proved that kids -- a demographic ignored by most 1970s movies -- were audience members too, that [[MerchandiseDriven merchandising spinoffs]] were a potential gold mine, that escapist sci-fi wasn't as [[BMovie disposable as once thought]], and that fantasy in general was an untapped resource. The whole GenreThrowback genre originated here, and while FollowTheLeader meant there were many crappy imitators within the years that followed, it did lead directly to Franchise/{{Superman}} getting [[Film/{{Superman}} a big movie of his own]], thus launching the rise of cinematic comic book adaptations. It also helped launch the revival of rival series ''Franchise/StarTrek''. Indeed, some blame this movie for hastening the end of the "New Hollywood" era and leading to the dumbed-down SummerBlockbuster mentality of the industry today. Especially once the ''sequels'' arrived� Furthermore, ''Franchise/StarWars'' fundamentally changed how movies were made because of the huge success the franchise had with marketing. Sure, the movies were profitable, but the real money was made in action figures and toys and posters and other kinds of merchandising. Any kind of family-friendly blockbuster is going to have [[KidAppealCharacter a cute character of some sort designed to appeal to children and sell toys to them.]]
* The ''Film/{{Superman}}'' movie proved once and for all that comic book adaptations didn't need to be cheesy or silly, with terrible budgets & special effects.
* ''Film/{{Psycho}}'' and ''Film/NightOfTheLivingDead'' are, along with the ditching of UsefulNotes/TheHaysCode and its replacement by the MPAA, widely credited for helping to turn the {{horror}} genre from "stories that are a bit spooky and feature the odd death" to "stories where AnyoneCanDie, deaths are bloody and brutal, and sometimes even TheBadGuyWins." Each of those films also helped to launch their own sub-genres of horror -- ''Psycho'' is considered to be the UrExample of the [[SlasherMovie slasher genre]], while ''Night'' single-handedly invented [[OurZombiesAreDifferent modern zombie fiction]].
* The ''Film/HarryPotter'' film series arguably did this for the entire SummerBlockbuster. At least, in [[Creator/BobChipman Moviebob]]'s [[http://www.escapistmagazine.com/videos/view/escape-to-the-movies/3688-Harry-Potter-and-the-Deathly-Hallows-Part-II opinion:]]
-->[''Film/HarryPotter'' is] a film series that, for better or worse, seems to have kicked off and excelled at every major trend in modern movie-making for the last decade. Things like the boom in the {{fantasy}} genre, to the reliance on [[DerivativeWorks recognized franchise names]], to the idea of [[Franchise/MarvelCinematicUniverse long-running cinematic continuity]], can all be traced back to this one game-changing production. Like it or not, the entire scope of movies are now living in the world that ''Film/HarryPotter'' created.
* Together with the aforementioned ''Potter'', the ''[[Film/TheLordOfTheRings Lord of the Rings]]'' films greatly raised the prestige of fantasy movies, much as the books had done for fantasy literature. Before then, fantasy films were generally limited to the FantasyGhetto, with only the rare ''Film/ConanTheBarbarian1982'' or ''Film/TheNeverendingStory'' emerging unscathed. Modern CGI also greatly helped filmmakers create convincing fantasy worlds that don't look like prop castles inhabited by stuntmen in rubber suits.
* ''Film/BladeRunner'' was a disappointment in a crowded summer box office when it came out. Repeated showings on cable and its release on video not only made it one of the first films to develop a strong cult following that way, but introduced the first entirely new way of visualizing the future in sci-fi films since ''Film/{{Metropolis}}'' a half-century earlier. Not only did its wet streets reflecting neon signs at night get copied widely in other films, commercials and music videos during the 1980s, it arguably influenced the look of urban space in the ''actual real-world future'' ([[http://www.flickr.com/photos/59303791@N00/2518314792/ see Times Square, ca. 2008]]).
** Furthermore, this was the film that popularized the [[ReCut Director's Cut]], giving audience a better chance to see a film like the artists truly intended while the film companies are motivated to cooperate with the profit of selling another version of a film to the same audience.
* The ''Franchise/{{Alien}}'' film franchise, especially ''Film/{{Aliens}}'', forever changed the narrative expectations of female characters in western futuristic stories. While one NeutralFemale or DamselInDistress character was the norm, now every primary female character in the future is expected to make like Ellen Ripley, grab a weapon, and join the fighting as much as any man.
* ''Film/AnimalHouse'' was probably the first "teen" movie to combine youthful angst with zany comedy -- which, in the ensuing decades, resulted in teen comedies becoming not only a lot more common, but a lot more serious as well.
* ''Film/TheCabinetOfDrCaligari'' was this for the entire genre of film, showing that movies could be more than slapstick comedy, DastardlyWhiplash melodramas, and jump-cut magic shows; they could also be frightening, thought-provoking, and just as narratively fulfilling as a novel or a piece of theatre.
* Early [[AttackOfThe50FootWhatever giant monster movies]] like the 1927 version of ''Film/TheLostWorld'' or ''Film/KingKong'' had their monsters as prehistoric forces unleashed on the modern world. ''Film/TheBeastFromTwentyThousandFathoms'', on the other hand, was the first to have its monster as a blend of primordial chaos and the contemporary, future-fear of [[ILoveNuclearPower the atom bomb]]. For most of the remainder of the 20th Century, giant monsters were nuclear-powered (''Film/{{Gojira}}'' and ''Film/{{Them}}'' being the best of those that followed), and even in a post-Cold War world, giant monsters still tend to represent some real-world, human-derived panic - ''Film/JurassicPark'' and [[GeneticEngineeringIsTheNewNuke genetic engineering]], ''Film/{{Cloverfield}}'' and terrorism, etc.
* ''Film/RoboCop1987'': When this film came out, the SuperHero movie genre seemed to have sunk with the embarrassing failure of ''Film/SupermanIVTheQuestForPeace'' earlier that year. However, ''[=RoboCop=]'' turned the genre around as a critically hailed hit SuperHero film that presented a cuttingly [[BlackComedy satiric]] SciFi {{cyberpunk}} thriller with a moving humanity that showed what the fantasy genre could be.
* ''Film/RogerAndMe'' (1989) forever changed documentaries. Beforehand, documentaries (of a non-musical nature at least) had been mostly confined to film festivals. ''Roger and Me'' demonstrated you could make a documentary that the masses would want to see, allowing other documentaries, including Moore's later ones, to achieve widespread box office and critical success.

* Creator/TomClancy didn't invent the TechnoThriller genre -- that credit belongs to the late Craig Thomas, who penned the book ''Literature/{{Firefox}}'' -- but he did bring it into the mainstream with his iconic debut volume, ''Literature/TheHuntForRedOctober'' which spawned more books, action movies, video games, and a whole franchise that has since made millions of dollars.
* ''Literature/TheLordOfTheRings'' wasn't the first fantasy novel, but it set up most of the devices of modern fantasy.
** What Tolkien didn't start, Creator/CSLewis did with ''Literature/TheChroniclesOfNarnia''. Not surprisingly, the authors were friends.
** Terry Brooks was the first fantasy author to be a best-selling author, and is considered to be the author that turned fantasy literature from a fringe cult phenomenon into a real industry. Interestingly, although his first Literature/{{Shannara}} book was heavily influenced by Tolkien, he also introduced some fantasy conventions of his own, such as a less formal writing style.
* ''Literature/ASongOfIceAndFire'' didn't invent DarkFantasy, and wasn't the first to use [[FlawedHero flawed]], or even [[VillainProtagonists villainous]] protagonists in a [[CrapsackWorld crapsack]] fantasy world, but thanks to it's popularity, it was one of the biggest reasons for the increase in the number of darker fantasy series being put out by publishers. It also helped inspire well-known non-literature examples of the genre, such as ''Franchise/DragonAge''.
* Creator/JohnWCampbell, a popular science fiction writer and magazine editor, is generally credited by Asimov, Clarke, Heinlein, and other science fiction writers as being responsible for nurturing their talents and for bringing higher standard of storytelling to the science fiction genre, which had previously consisted mostly of {{utopia}}n literature, stories of aliens and fantastic gadgets, and {{space Western}}s. Genre historians often date the beginning of science fiction's Golden Age as being 1938, the year Campbell assumed editorship of ''[[Magazine/{{Analog}} Astounding Science Fiction]]'' magazine.
* ''Literature/{{Neuromancer}}'' more or less ''created'' the CyberPunk sub-genre of SciFi.
** ''Neuromancer'' was this for sci-fi as a whole, especially combined with the movie ''Blade Runner''. Both works eschewed the idea of the InvincibleHero and focused on individuals who were relatively powerless in the respective worlds that they lived in. (As an interesting example, look at ''Franchise/StarTrek: [[Series/StarTrekTheOriginalSeries The Original Series]]'' vs ''[[Series/StarTrekTheNextGeneration The Next Generation]]''. In ''TOS'', the stories focus frequently focus on either Spock or Kirk saving the day, while ''TNG'' focuses much more on the crew as a whole. Also, ''TOS'' featured the Federation much less (until the movies, especially the post-'Neuromancer'' ones) than ''TNG''). Since ''Neuromancer'' and ''Blade Runner'', sci-fi protagonists have been used much more as a tool to examine the world that they live in.
** While Neuromancer was the GenrePopularizer for and TropeCodifier for CyberPunk, the 'turning point' for the genre, arguably, was SnowCrash which changed much of the aesthetics for CyberPunk, moving things out of noir and into a more eclectic 'punk' sensibility.
* ''Literature/DonQuixote'' was not only the first "modern" novel, but it also single-handedly killed "knight stories" (ChivalricRomance, adventure stories with a KnightInShiningArmor as the main character -- think KingArthur & company).
* ''Literature/MollFlanders'' changed the novel forever. Defoe's realism made it unlike anything which had gone before; his plot was completely original, in an age of reworking classic plots; and his narrator was something new and very interesting.
* Creator/HPLovecraft went from simple stories of the macabre and ghost stories to CosmicHorrorStory, [[FollowTheLeader which changed the face of the horror genre forever]]; StephenKing, to give just one example, owes a great deal of his success to Lovecraft. His influence can be seen on this very wiki; [[DidYouJustIndexCthulhu check out how many tropes one of his monsters inspired.]]
* ''The Spy Who Came In From the Cold'' changed the spy novel genre, moving it from the romantic, action thrillers characterized by Ian Fleming's James Bond to a gritty and morally uncertain genre steeped in procedural details, with the decidedly un-sexy George Smiley as protagonist.
* While YoungAdultLiterature had existed for decades, the ''Franchise/HarryPotter'' [[Literature/HarryPotter books]] turned it into a pop culture phenomenon that's often credited with almost single-handedly restoring interest in reading among younger generations. It also proved that books written for children didn't have to be watered-down to the point of being stripped of all their depth, especially once later books started [[DarkerAndEdgier growing up with their readers]]. Without ''Harry Potter'', the likes of ''Literature/{{Twilight}}'' and ''Literature/TheHungerGames'' would never have been as successful as they were.

[[folder:Live Action TV]]
* ''Series/StarTrekTheOriginalSeries'', despite it not doing spectacularly well in the ratings, spawned numerous short-lived imitators (a few coming from Creator/GeneRoddenberry, ''Trek'''s creator) in comic books and television. During the '70's it served as ''the'' template for ScienceFiction television in America (and to a lesser extent, the rest of the world) until the advent of ''Franchise/StarWars'', though the clones tended to only last for a season or two. Even the original ''Series/{{Battlestar Galactica|Classic}}'' and other works influenced by ''Franchise/StarWars'' showed its influence. Its impact lasted as late as the '90s, though more in the form of television reacting ''against'' the series.
** ''Franchise/StarTrek''[='=]s influence, however, would go on to shape far more than science fiction as a genre; not only is it the TropeCodifier (and {{Trope Namer|s}}) for the PowerTrio, but things like automatic doors, Kindle, iPods, bluetooth, cell phones and laptops were all first conceived for ''Franchise/StarTrek''. Its impact even goes beyond pop culture and technology; Dr. Mae Jemison, the first African-American woman to work in space, was inspired to become an astronaut after seeing Lieutenant Uhura on television as a little girl.
* ''Series/DoctorWho'' had a similar status in the [[UsefulNotes/{{Britain}} United Kingdom]]. It, too, spawned numerous homages, ranging from the long-running but much-mocked ''Series/TheTomorrowPeople'' to the dark and cerebral ''Series/SapphireAndSteel'', as well as many other less well-known examples. Similarly, the 2005 revival is credited with restoring Saturday night family dramas to British television as others began to capitalize on its success.
* ''Franchise/StarTrek'' and ''Franchise/StarWars'' were (and still are) considered the bastions of American ScienceFiction, both being notable for their 'optimistic' views. ''Series/BabylonFive'' and ''Series/StarTrekDeepSpaceNine'' started taking sci-fi in a new direction, away from the SpaceOpera[=/=]SpaceWestern concept and made them more character driven dramas, almost like cop shows. This started a slow but steady shift in the television sci-fi genre that later yielded ''Series/{{Farscape}}'', ''Series/TheXFiles'', and culminated in the reimagined ''Series/{{Battlestar Galactica|Reimagined}}'' and ''Series/StargateUniverse''.
* ''Series/{{LOST}}'' popularized the idea of shows built around long-term {{myth arc}}s that [[MindScrew jerk the viewer's mind around]], as well as bringing sprawling, SoapOpera-style storylines into TV sci-fi. While it has its antecedents (''Series/TwinPeaks'', ''Series/TheXFiles'', the aforementioned ''B5''), the boom in such programming after ''LOST'''s success shows why the trope is called the ''{{Noughties|DramaSeries}}'' [[NoughtiesDramaSeries Drama Series]]. ''Series/{{LOST}}'' also played a significant role in convincing networks that a successful mainstream series could experiment with non-linear storytelling.
* In the late '90s and early '00s, {{Creator/HBO}} shows like ''Series/TheSopranos'', ''Series/TheWire'', ''Series/SexAndTheCity'', and ''Series/{{Oz}}'', with their focus on cinematography, acting, and complex themes and storylines developed through sharp writing and in-depth characters, proved that television productions can be just as good as Hollywood movies, and that cable television could seriously compete with the broadcast {{networks}} on their own turf. This has led to what some have described as a new golden age for American television, that is still apparent on HBO with shows like ''Series/GameOfThrones'', but has also spread to basic cable channels such as Creator/{{AMC}}, primarily with ''Series/BreakingBad'' and ''Series/MadMen''. AMC's ''Series/TheWalkingDead'' regularly pulls in over 10 million viewers, a number that not only was once thought unattainable by smaller cable shows, but thanks to cable turning the audience tide, actually dwarves the ratings of most broadcast fare in the 2010s.
** Said shows also brought more mature content into American television, which, until then, was largely restricted to fairly tame (about a mild PG-13) programming due to [[MediaWatchdog the FCC]], whose rules only covered broadcast networks (cable, as a pay service, was exempted). Due to these restrictions, much of the creative boom in American TV over the last decade has been on cable networks -- and more specifically, on ''premium'' cable networks, which not only don't have to worry about the FCC, but also don't have to worry about advertisers being pressured by MoralGuardians to pull their ads.
* ''Series/{{Seinfeld}}'' changed the way SitCom characters and stories are portrayed so completely that the original series seems [[SeinfeldIsUnfunny derivative]] in the new context it created.
* ''Series/HillStreetBlues'' was the series for which the term "gritty cop drama" was invented. The use of hand-held cameras gave viewers the feeling of being in the middle of a messy, dangerous, often chaotic, big-city landscape. Other camera techniques, such as tight closeups, use of offscreen dialogue and rapid cuts between stories gave the series a "documentary" feel. It pioneered intertwined storylines in an episode, some of which took several episodes to play out. Many episodes were written to take place in a single day. It was one of the first cop shows to have dirty-cop arcs instead of one-shot or guest appearances. A Jack Webb series it wasn't.
* ''Series/GameOfThrones'' and its source material, ''Literature/ASongOfIceAndFire'', have been credited with the recent boost in mainstream acceptance of {{Fantasy}}, particularly DarkFantasy. Their widespread acclaim, thanks to their mature and complex storylines and characters that are clearly made for adults (throwing out the [[FantasyGhetto unfair notion that Fantasy is only for kids or family-friendly]]), and their massive {{Fandom}}, have put them into the public eye, made the books bestsellers and made the show one of the most critically and commercially successful television dramas of the past decade, often being listed as being on the level of shows such as ''Series/BreakingBad'' and ''Series/MadMen'', [[FollowTheLeader as well as inspiring a noticeable number of medieval fictions for television.]]
* ''Series/OrangeIsTheNewBlack'', ''Series/HouseOfCardsUS'' and ''Series/ArrestedDevelopment'' season 4 have completely changed TV audiences perceptions of shows exclusive to services like Netflix, from mediocre stories and poor budgets to exceptionally well made and highly successful shows that stand on par with prime-time television.

* Music/TheBeatles did this for pop and rock music. Which of their ''albums'' is most influential is debatable, but the majority seems to settle on ''Music/SgtPeppersLonelyHeartsClubBand'' for the numerous innovations it introduced to music, as well as still being considered to be one of, if not ''the'', best mixed albums ever. Now, consider for a moment how much more sophisticated the technology for mixing has become 40 odd years later. (Keep in mind this [[PortingDisaster only]] [[GratuitousPanning applies]] to the mono version.) ''The White Album'' is also a fair contender for the title of "best Beatles album."
** It's also debatable whether it was just them or the whole of UsefulNotes/TheBritishInvasion. Those who argue the former say that there wouldn't have ''been'' a "British invasion" without Music/TheBeatles, while the latter point out that the Beatles were only one band out of many, and that Music/TheRollingStones, Music/TheWho, and other bands also deserve recognition. That said, while they certainly weren't the only worthy or notable British act of the 1960s, the Beatles' success (not only as the first British rock act to significantly break into the American market in a lasting way, but having achieved numerous number one hits in the process) certainly paved the way for the others to build on their success.
* Music/TheBeachBoys' ''Music/PetSounds'' was an inspiration for the Beatles' ''Sgt. Pepper'' to become a ConceptAlbum. It was not exactly narrative, however, and also not the first concept album. Take for example, Johnny Cash's ''Ride this Train'' or Ray Charles's ''The Genius Hits the Road'' released about six years before. The Ventures were also making concept albums years before Pet Sounds. This also represented something of a friendly rivalry between the Beach Boys and the Beatles, or at least Music/BrianWilson and Music/PaulMcCartney, as they began to engage in a constant process of trying to one-up the other, in the process producing some great music.
* Music/EricClapton's short, but legendary stint with John Mayall and The Bluesbreakers produced only one album [[FanNickname often called Beano]]. The album is credited to be the first album to feature modern rock guitar. Eric Clapton was the first guy to dare to crank up his amp and take his space. Many people say Music/JimiHendrix was the first modern rock guitar player, but he got his inspiration from hearing this album.
* Eddie Van Halen's 80 second guitar solo on Music/VanHalen's first album was the "Eruption" heard round the world. Shredding was born and rock guitarists became virtuosos in their own right. While the style fell out of favor in mainstream rock in the early 1990s, it's still a major element of various metal and progressive rock scenes worldwide.
* Rap music received plenty of media attention for most of TheNineties, but most of it was on the back of [[GangstaRap the controversy it generated]]. Then [[Music/TheNotoriousBIG Biggie]] and Music/{{Tupac|Shakur}} got shot, and Sean "Puffy" Combs released his hit album ''No Way Out'', and suddenly GlamRap became the dominant form of "urban" music on the radio for the rest of the decade and the start of [[TurnOfTheMillennium the next]]. TheNineties as a whole were a turning point for rap music. The decade introduced a large array of sub-genres that showed that rap could be more than just block party music, and that it could also have strong messages and themes. It also saw the growth in rap's popularity outside of UsefulNotes/NewYorkCity, resulting in what is arguably the climax of the Golden Age era.
* Music/ChuckBerry's "Johnny B. Goode" brought the EpicRiff into rock music once and for all, and showcases a guitar style that, even after Hendrix and Clapton, would barely sound out of place today.
* Music/BobDylan's ''Music/Highway61Revisited'', especially "Like a Rolling Stone." Bob's early output in general has often been cited as a major influence in bringing true art and poetry into pop music writing. It can't be a coincidence that his rising popularity in the first half of the 60's coincided with something of a move away from the up to then ubiquitous hot cars and fast women thematics, when people started listening to songs like "Blowing in the Wind" and "Mr Tambourine Man" instead.
%%* Almost all of Music/{{Metallica}}'s first three albums could count as this for thrash metal, being {{Trope Codifier}}s for the genre in different ways.
* Music/BlackSabbath's first album for heavy metal. If a heavy metal band says they're not influenced by them, either they're lying or they're not really metal.
%%* Venom may have been the trope namers, but it was Music/{{Mayhem}}'s album ''De Mysteriis Dom Sathanas'' that really defined what BlackMetal would come to be known as.
%%* Similarly, DeathMetal would be launched by a band known as Music/{{Death}}. Their song "Crystal Mountain" is considered to be one of the most defining songs in all of death metal.
* Music/TheDoors proved that you could write and perform pop songs about much more existential subjects than [[SillyLoveSongs teenage romance]] or [[HeavyMeta pop music itself]], and kids would buy them. After that, it became impossible to write off all popular music as a disposable, meaningless fad.
* The Music/VelvetUnderground's début, ''Music/TheVelvetUndergroundAndNico'', didn't have an immediate impact on rock music, but it did have an undeniable impact on rock music. Music/BrianEno's famous quip that everyone who bought the album started a band doesn't seem very far off when one considers the huge number of genres that it inspired.
* Music/{{Aerosmith}}'s 1986 collaboration with Music/RunDMC on "Walk This Way". Before this, {{Rap}} fans and {{Rock}} fans generally held each other's music in contempt and there was a fair amount of antagonism between the fanbases. The release showed the two groups that they were NotSoDifferent and did much to bridge the gap between them and kickstarted the entire Music/RapRock genre that would become extremely popular in following decade.
* Even before the Eric Clapton example above, {{Music/Elvis Presley}}'s sideman, Scotty Moore codified the idea of the lead guitarist as TheLancer in a rock band. Before him the soloist and the frontman were usually the same person (IE. {{Music/Buddy Holly}}, {{Music/Chuck Berry}}, {{Music/Carl Perkins}}) and was just as likely to be a piano player (IE. {{Music/Little Richard}}, {{Music/Jerry Lee Lewis}}.)

[[folder:Professional Wrestling]]
* Wrestling/{{ECW}} brought hardcore wrestling to North America, made luchadores popular in the United States, and made professional wrestling DarkerAndEdgier at a time when the two biggest promotions, the Wrestling/{{WW|E}}F and Wrestling/{{WCW}}, were still putting out an altogether LighterAndSofter, more comic-book-ish product. Amazingly enough, WCW, part of the Time Warner media empire, and WWF, a multi-million dollar entertainment company in its own right, ended up taking their cues from a tiny promotion that ran shows out of a converted bingo hall in South UsefulNotes/{{Philadelphia}}.
* The WWF also had one at some point between 1996 and 1998, but mileage varies on what exactly it was. Some people cite [[Wrestling/StoneColdSteveAustin Steve Austin]]'s victory at King of the Ring 1996 and resulting Austin 3:16 promo, which made him the only thing to rival the Wrestling/NewWorldOrder in popularity. Others cite Austin's match against Wrestling/BretHart, face of the WWF along with Wrestling/ShawnMichaels, at [[Wrestling/WrestleMania WrestleMania XIII]], when Austin turned face and Hart heel. Others will cite the formation of Wrestling/DGenerationX, an edgy, raunchy stable that was somewhat [=nWo=] influenced (it had members of Wrestling/TheKliq in it as well, after) and feuded with the Hart Foundation, Bret Hart's group. Resulting from that feud was Michaels and Hart's match at Survivor Series 1997, Hart's last match in the WWF under his current contract. The match was to end ambiguously and Hart was to surrender his championship the next day on Raw, but Michaels, Wrestling/VinceMcMahon and Wrestling/TripleH [[Wrestling/MontrealScrewjob conspired to end the match without Hart's knowledge.]] This event created the Mr. [=McMahon=] character and a decade's worth of unmitigated hostility between Hart and those involved. The final event is Austin's match against Michaels at [=WrestleMania=] XIV, when Austin defeated Michaels and in the words of JR "The Austin Era (had) begun." This event kickstarted the Austin-[=McMahon=] feud, which would be the focal point of the entire company for three years, in the company's most successful or second most successful era, the Wrestling/AttitudeEra. Similarly, at and before [=WrestleMania=] X-Seven, the Wrestling/AttitudeEra ended. Vince purchased WCW, the company's chief rival, and at Wrestling/WrestleMania, one of the greatest PPV's in history, Austin faced [[Wrestling/DwayneJohnson The Rock]] for the WWF Championship, unbelievably, Stone Cold turned heel in his hometown and sided with [=McMahon=] to beat Rock. The central feuds of the Attitude Era, both in real life and kayfabe, had ended within a week of each other.
* [[Wrestling/SuperstarBillyGraham "Superstar" Billy Graham]] did this for heels in the mid-1970s. He was just as flashy and entertaining as any face, and proved that the heel didn't always have to be a StrawLoser. He was actually hoping for his character to be turned face during his 1977-1978 title run, and was extremely disappointed when that didn't happen, although he eventually did become a face when he returned to the WWF years later. It should also be noted that he was the first major heel to hold a world title for more than a few weeks at a time.
* The 2006-2007 double whammy of the Sports Illustrated steroids report -- in which several wrestlers were named for purchasing performance-enhancing drugs, including fan favorites ReyMysterio and Wrestling/{{Edge}} -- and the horrific Chris Benoit murder-suicide of his family put the WWE under the harshest negative light it had ever encountered. Sponsors began to leave in droves as the company was painted as a misogynistic, crass, steroid-fueled carny show and the media had ten years worth of AttitudeEra footage to drive home that point (they had a field day with the infamous "Vince makes Trish strip and bark like a dog" segment). In 2008, the WWE began a company-wide sanitizing of their product to shed the "Attitude" image, phasing out blood, foul language, and sexually charged characters and angles, cleaning up RAW to a TV-PG product, doubling down on their charity work with children, and implementing a strict drug testing program. They even removed "Wrestling" from its name in order to promote itself as family-friendly general entertainment and sever its association to pro wrestling and its associated stigmas ("WWE" is no longer an acronym outside of legalese). Although long-time fans decry the LighterAndSofter route to this day, the company has repaired its image in the public eye, as kid-friendly companies like Chef Boyardee renewed their sponsorships in the end, the media reports often on their charitable actions, and celebrities and athletes participate on the shows, illustrating that it is no longer a negative connotation to be associated with WWE.

* This has happened multiple times in UsefulNotes/{{baseball}}.
** In the 1920s, Babe Ruth popularized the idea of the home run, shifting much of the game's offensive focus from baserunning speed to long-ball power. Indeed, Ruth basically "invented" a fairly common player type in modern baseball: the fat, left-handed power hitter/outfielder.
** JackieRobinson's breaking down the color line was this for more than just the sports world. Not only did it create interest in successful Negro League players, it was also an early turning point in white America's acceptance of the idea that [[UsefulNotes/CivilRightsMovement black people weren't so different from them]].
** The airing of Major League Baseball games on television in TheFifties destroyed most of the minor leagues, who couldn't compete with the bigger games being shown on TV.
** The move of the New York Giants and the Brooklyn Dodgers to, respectively, UsefulNotes/SanFrancisco and UsefulNotes/LosAngeles in 1957 will probably never be forgiven by [[BigApplesauce New York]] sports fans, but it helped popularize baseball outside the East Coast and the Midwest and led to a surge of teams moving to sunny Southern and Western cities, securing the sport's national viability for the rest of the century. It also effectively destroyed the Pacific Coast League (which was, until then, seen as a growing rival to Major League Baseball), pushing it down into the minors and securing MLB's position as the dominant baseball league in the US.
** Maury Wills helped repopularize the stolen base in the early 1960s.
** Rollie Fingers was central to the idea of the dedicated relief pitcher/closer in the 1970s, paving the way for the modern game's reliance on the bullpen.
** The 1975 World Series between the Cincinnati Reds and Boston Red Sox, one of the most exciting matchups in sports history, was the moment at which television finally understood how to broadcast baseball. Carlton Fisk's iconic home run in Game 6 provided a catalyst in getting camera operators to focus most of their attention on the players themselves. It's no coincidence that, after the '75 World Series, a new lucrative TV deal involving not just Creator/{{NBC}}, but Creator/{{ABC}} was made.
** The early success of Hideo Nomo paved the way for Major League Baseball's interest in Japanese players.
** The fallout of the Mitchell Report and Congress steroid investigation, as well as an implemented drug policy, has lead teams in the present day to favor rosters of players with versatility and sound fundamentals again, as aging, one-dimensional sluggers can no longer rely on medical help to extend their careers with eye-popping home run totals.
* In AustralianRulesFootball, the 1970 VFL Grand Final is often seen as the point at which a major shift in the game occurred. Carlton, 44 points down at half time, came back to defeat Collingwood after a rousing half-time speech by coach Ron Barassi in which he exhorted the players to handball - and ever since then, the handball has been a much more prominent feature of the game, sometimes more common in a match than kicking the ball.
* Several players have shifted the way Ice Hockey gets played. Highlights include:
** Bobby Orr popularizing the concept of defensemen supporting offensive plays
** Patrick Roy is credited for popularizing the butterfly goaltending style
** Wayne Gretzky for his use of the behind-the-net goal setup.
* In UsefulNotes/AmericanFootball, initially field goal kickers kicked the ball towards the goal posts straight on, the results being that most field goals didn't have much distance and their accuracy was iffy at best (60% or so). Then Pete Gogolak and others introduced the angled, soccer-style kick for field goals, increasing distance and accuracy and immediately improving the viability of field goals tremendously. As of today the soccer-style kick is used professionally almost exclusively.
** And the place kick (straight on) replaced the drop kick, where the kicker dropped it like a punter and let it hit the ground before kicking it. The last time it was used was by Doug Flutie as an homage.
** In 1913 the team from an obscure Catholic college in northern Indiana traveled to West Point, New York to take on Army, one of college football's powers. The forward pass had been legalized 7 years earlier but was still considered a risky novelty play. Over the previous summer Notre Dame's quarterback Gus Dorais and receiver Knute Rockne worked as lifeguards on Lake Erie and practiced throwing and receiving on the beach. Their coach Jesse Harper decided to use a pass-based offensive scheme against Army. [[http://125.nd.edu/moments/this-day-in-history-the-forward-pass-1913-vs-army/ Notre Dame humiliated Army]] 35-13. Their win legitimized passing as an offensive tool, which opened up the game and made it more exciting, and kickstarted Notre Dame's status as a college football icon.
* In 1978, the NFL introduced several rule changes in an effort to encourage more scoring on offense and generally make the games more exciting to watch. Perhaps the biggest change was the rule that effected defensive backs; previously, defenders could make contact with receivers anywhere on the field past the line of scrimmage. The new rules limited contact between defenders and receivers to up to five yards past the line of scrimmage and no further, with any further contact resulting in pass interference. Often called the "Mel Blount Rule", after the Pittsburgh Steelers cornerback who was known for being an extremely physical player, it opened up the passing game and forever changed the way offense was played in the NFL. Oddly enough, it was the Steelers who would win Super Bowl XIII, the first Super Bowl played under the new rules.
** Before the 2011 season, the NFL increased restrictions on what defensive backs could do to impede receivers; although they were meant with safety in mind, this opened up offense in previously unseen ways. Before, you would see about a half-dozen games in a given season where a QB would reach 400 yards in a game; almost overnight, it became a weekly occurrence, starting with an ominous Week 1 where rookie Cam Newton threw for over 400 yards in his very first pro game. The passing game has now become so prolific that it has rendered the days of 25-carry-a-game [=RBs=] almost obsolete [[note]] in addition to pass-heavy offenses having an edge, there has also been a growing philosophy that most teams have adopted, using a 2-RB system that keeps two guys fresh all year while giving defenses different looks; one will usually be a faster, shiftier back and the other more of an up-the-middle bruiser[[/note]]; in 2013, no RB was taken in the first round of the draft for the first time in the Super Bowl era. In 2014, no RB was taken in the first round yet again.
* Certain single games and/or series have breathed life into otherwise stagnant or dying leagues. The 1979 NCAA basketball championship between Larry Bird's Indiana State team and Magic Johnson's Michigan State team breathed new life into college basketball. Five years later, the 1984 NBA Finals between Bird's Boston Celtics and Magic's Los Angeles Lakers helped spark a revival in the NBA, which had languished in popularity before the pair entered the league.
** The New York Jets' upset victory over the Baltimore Colts in Super Bowl III arguably lent the American Football League credibility against the more established National Football League. It helped that Jets' quarterback Joe Namath's "guarantee" that the Jets would win added to the pregame hype (unheard of in the previous two games). The Kansas City Chiefs' win over the Minnesota Vikings the following season proved that it wasn't a one shot, fluke deal for the AFL leading up to the eventual merger in 1970.
** The 1958 NFL Championship Game between the New York Giants and the Baltimore Colts, also called "The Greatest Game Ever Played", was the first NFL playoff game to go into sudden-death overtime, and the game was nationally televised by NBC, with an estimated 45 million people watching it. At the time, baseball was still the preeminent sport in America, and while it would remain so for at least another decade, the 1958 NFL Championship Game marked the beginning of football's rise to prominence, and eventual usurpation of baseball as America's top sport. The Colts' 86-yard drive to tie the game at the end of regulation and force overtime is also cited as the first "two-minute drill." While several other games since could claim the title of "Greatest Ever", when most people reference the turning point of pro football, this game generally given credit.
* The High Jump was revolutionized by Dick Fosbury in 1968. It's weird as heck to watch someone do a Fosbury Flop (it involves turning around at the point of the jump and going ''backwards'' over the bar), but it manages to allow jumpers to jump as much as 25% higher than they would be able to jumping straight forwards over the bar.
* The 2005 fight between Forrest Griffin and Stephen Bonnar on the undercard of The Ultimate Fighter finale, the first ever live-televised MMA event. Their legendary, back-and-forth brawl over a UFC contract made instant fans almost overnight, and it's been documented that ratings spiked during the fight as fans were frantically calling other people to point them to this fight. UFC president Dana White credits this fight as perhaps the most landmark moment in MMA history, and the turning point that launched it to such great, mainstream heights.
* In [[TheBeautifulGame Soccer]], the 1953 match between England and Hungary is widely regarded as being the point when the modern game came into being. The Hungarians playing a then unknown tactical style totally outclassed the English, who until that point had never been defeated at home by a team from outside the British Isles. In the aftermath the old English formations and tactics vanished entirely, and the continental tactics, training and equipment became the standard around the world.
* For {{cricket}}, Kerry Packer's World Series Cricket, launched in 1977, introduced colored team uniforms, day/night matches, and player payments high enough that being a professional cricketer was a viable career option.
* Dr. J pretty much paved the way for flashy basket ballplayers with devastating dunks in the NBA. People like Clyde Drexler, Dominique Wilkins, Kobe Bryant, MichaelJordan, Lebron James, Magic Johnson etc.
** Pistol Pete arguably brought in the no-look circus pass in the NBA.
* NHL: the moment when Montreal Canadiens goalie, Jaques Plante, put on his goalie mask for the first time in regular play. That marked the start of where the personal safety of the players started to gradually being taken more seriously with the rise of new equipment like mandatory helmets, face visors and cracking down on violence like head shots and fighting.
* The popularity of soccer in the United States skyrocketed after the country hosted the 1994 FIFA World Cup. After the event, a professional league in the US (Major League Soccer) was established and television ratings for matches have soared, with an estimated 24 million people watching the 2014 World Cup match between the US and Portugal.

* In the mid-to-late 19th century, the London stage was full of all kinds of vulgar, lewd, and risqué shows (of course, so were stages in all the European capitals); the works of Creator/GilbertAndSullivan showed there was room for family-friendly fare in the theatre. This in itself would be a turning point, but after Gilbert and Sullivan, those making "light opera" or "operetta" began following the G&S model...and a little while later people realized that G&S had invented TheMusical.
* ''Theatre/{{Oklahoma}}'' changed the musical theatre genre from fluffy entertainment into legitimate theatre.
** Well, ''Oklahoma'' gave musical theatre the format of the use of song, dialogue, and dance, but it was ''ShowBoat'' that first made musical theatre into legitimate theatre.
*** ''Oklahoma'' was not the first musical to use song, dialogue, and dance - those three things were in every musical. What ''Oklahoma'' did was integrate those three elements in a mature and realistic fashion (well, as realistic as breaking into song ever can be, but then {{Opera}}'s been doing that for four hundred years and hardly anybody complains about that.)
* Creator/{{Aeschylus}} did this for drama -- [[OlderThanFeudalism 2500 years ago]] -- when he made drama using contemporary, rather than mythical, themes. Creator/{{Euripides}} reinvented theater again, by focusing more on the characters and their motivations, adding larger casts, and making the dramatic aspects much less subdued.
* Creator/CirqueDuSoleil accomplished this trope twice over:
** Starting with its 1987 tour ''Theatre/LeCirqueReinvente'', Cirque did a lot to raise circus out of the kiddie entertainment ghetto it had fallen into in North America. Now, not only are there many successful "contemporary circus" troupes/companies that play to a wide variety of audiences, but [[TheMockbuster blatant imitators]] of Cirque's style (which was derived from European and Asian circuses) have sprung up.
** Their first Las Vegas resident show, ''Theatre/{{Mystere}}'', helped change that city's entertainment scene. Siegfried and Roy's magic show at the Mirage had opened four years prior and was also a big game changer after years of increasingly stale showgirl revues, but ''Mystere'' was actually taken seriously as theater, to the point that ''Time'' magazine's theater critic named it one of the best shows of 1994. While it would lead to many acclaimed sister productions in the city, other Vegas casino-hotels imported such productions as Music/BlueManGroup, ''Theatre/JerseyBoys'', and ''Theatre/TheLionKing'', often with huge success, resulting in a more diverse range of entertainment for tourists.

[[folder:Video Games]]
* ''Franchise/SuperMarioBros''
** In the field of video games, ''VideoGame/SuperMarioBros1'' defined the 2D platformer, as well as ensuring the resurrection of the video game home console in the United States after TheGreatVideoGameCrashOf1983. Previous entries, such as ''VideoGame/{{Pitfall}}'' and Nintendo's own ''VideoGame/MarioBros'' and ''VideoGame/DonkeyKong'', took place on a single screen or series of screens. Super Mario Bros' innovative scrolling screen was so influential that even the ''name'' of the genre was changed, being popularly known as "sidescrollers" until the leap to 3D.
** And then another Mario game, ''VideoGame/SuperMario64'', set the standard for 3D platformers for years to come, and was the first 3D platformer to successfully use a joystick.
** Yet another Mario game, ''VideoGame/NewSuperMarioBros'', proved with its high and unexpected popularity that looking to gaming's past is not a sign of creative stagnation. Hence, the massive influx of retro-flavored games afterward, including Nintendo's own ''VideoGame/DonkeyKongCountryReturns''.
* ''VideoGame/SonicTheHedgehog'' helped define part of the culture of TheNineties by creating the MascotWithAttitude, and showing how fast gameplay could work as a platformer. In the process, it created the UsefulNotes/ConsoleWars between Creator/{{Sega}} and Creator/{{Nintendo}}.
* ''VideoGame/PrinceOfPersiaTheSandsOfTime'' made platforming "realistic" with its use of [[LeParkour parkour]], and set the stage for, among other things, ''[[VideoGame/TombRaiderLegend Tomb Raider: Legend]]'', ''[[VideoGame/AssassinsCreedI Assassin's Creed]]'' (which was, not coincidentally, made by the same studio as ''Sands of Time'') and ''VideoGame/{{Uncharted}}''. Back in 1989, ''VideoGame/PrinceOfPersia1'' did the exact same thing, with its realistic platforming and fighting.
* ''VideoGame/FinalFantasyIV'' (or ''Final Fantasy II'' as it was known to North American audiences) wasn't the first console RPG to have plots more complex than just presenting a series of obstacles and quests your party has to get around or even to have some character development, but for the newly born 16-bit generation of role-playing games it certainly raised the bar for what players expected out of [=RPGs=], making more sophisticated storytelling as much a part of the console RPG experience as gameplay or fantastic settings.
* ''VideoGame/FinalFantasyVII'' rewrote the rulebook for the 3D RPG genre, popularizing highly cinematic presentation enabled by CG rendering and the newly increased storage space of [=CDs=], and dynamic camera angles and movement in battles presented in 3D.
* ''VideoGame/StreetFighterII'' altered the face of the {{fighting game}}, shifting focus from [[BeatEmUp side scrolling brawlers]] onto one on one fights, varied character rosters, and competitive two player modes. It also had a {{good bad bug|s}} that let you "{{Combo|s}}" moves together.
* ''VideoGame/VirtuaFighter'' likewise proved that fighting games could easily make a transition into 3D, in addition to showcasing more natural forms of combat as opposed to the fireballs and wuxia of its 2D brethren.
* In the '90s and early '00s, several games each popularized pieces that would coalesce into the modern FirstPersonShooter genre that we know today.
** There had been games like ''VideoGame/Wolfenstein3D'' before it, but none had the immediate impact of ''VideoGame/{{Doom}}'', the {{Trope Maker|s}} that [[GenrePopularizer popularized]] the genre in the mainstream consciousness. Notably, it the first FPS to offer multiplayer (via LAN or dial-up modem).
** ''VideoGame/{{Quake|I}}'' was not the first FPS game with built-in Internet multiplayer[[note]]Creator/{{Bungie}}'s VideoGame/{{Marathon}} shipped with [=AppleTalk=] network multiplayer, complete with voice chat, two years prior. [=AppleTalk=] could be routed over the Internet, but it wasn't common at that time.[[/note]], but it played a large role in turning it into one of the staples of the genre. Virtually every FPS released since ''Quake'' includes a multiplayer mode, with many FPS fans buying games solely for the multiplayer and never touching the single-player.
** [[AccidentalPun Rarely]] does [[TheProblemWithLicensedGames a licensed game]] redefine conventions. Yet this is exactly what ''VideoGame/{{GoldenEye|1997}}'' did in 1997. Not only did it set the standards for every shooter of its generation, but more importantly, it showed that FPS games on consoles didn't have to be watered down compared to their PC counterparts, and could be legitimately great games in their own right.
** ''[[VideoGame/HalfLife1 Half-Life]]'' introduced scripted setpieces, the illusion of intelligent AI, and story-driven progression rather than a simple sequence of key and switch hunts.
** ''VideoGame/MedalOfHonor'' and ''VideoGame/CounterStrike'' popularized the military shooter, with a much greater focus on realism and authenticity as opposed to over-the-top action and sci-fi storylines.
** ''Franchise/{{Halo}}'' brought in RegeneratingHealth and the LimitedLoadout, in addition to mixing up the gameplay with environments which alternated between wide open spaces and tight corridors and mixed on-foot and vehicular action. These elements existed prior to this, but ''Halo'' blended them into a kind of alchemic formula that stuck.
** And a year later, ''VideoGame/MetroidPrime'' successfully fused the FPS with the adventure genre, creating a first-person shooter where the focus was not on combat, but rather exploration and puzzle-solving. Those had long been staples of video games, but ''Metroid Prime'' really was the [[TropeCodifier codifier]] for their inclusion in the FPS genre. To this day, almost every modern FPS can trace its roots back to either ''Halo'', ''Metroid Prime'', or ''Medal of Honor''.
* ''VideoGame/CastleWolfenstein'' was one of the first games in the stealth game genre, but it wasn't until the success of ''VideoGame/MetalGearSolid'', ''VideoGame/{{Thief}}'', and ''[[VideoGame/{{Tenchu}} Tenchu: Stealth Assassins]]'' that the genre began to attract attention. Other stealth game series, like ''VideoGame/SplinterCell'' and ''VideoGame/{{Hitman}}'', have continued this with quirks of their own.
* PC gaming was generally seen as inferior to console gaming until the advent of ''VideoGame/{{Doom}}'', which was made by, of all things, a {{shareware}} company, causing gaming companies everywhere to rethink their business model.
** On that note, shareware in general (where you gave away part of your program for free, and the user would pay you money for the full thing if they liked it) was seen as a really stupid idea that could never possibly make money. Apogee Software and Epic [=MegaGames=] came along and proved that the model ''could'' be profitable, at least with games. Apogee made a lot of money with the game series ''Kingdoms of Kroz'', and Epic with ''[=ZZT=]''. Keep in mind this is way BEFORE the days of the Internet, which made distributing shareware easy. Apogee later changed their name to 3D Realms and created ''VideoGame/DukeNukem3D'', and Epic went on to create the ''VideoGame/{{Unreal}}'' and ''[[VideoGame/GearsOfWar Gears of War]]'' series.
*** Game-wise, ''VideoGame/DukeNukem'' (Apogee), ''Jill of the Jungle'' (Epic) and ''Commander Keen'' (Id) popularised shareware. One from each major company.
* ''Gears of War'' seems to have lead third person shooters as a genre to strategic cover-based gameplay.
* ''VideoGame/GrandTheftAutoIII'' completely redefined the concept of the types of things video games could show. It was unapologetically full of graphic violence, and also made the {{wide open sandbox}} a viable genre for video games. Unfortunately, it also helped sell the idea of video games as "[[NewMediaAreEvil murder simulators]]".
** [[OlderThanTheyThink Before]] ''GTA III'', in the early '90s ''VideoGame/NightTrap'', ''VideoGame/MortalKombat'', and ''Doom'' provoked the first significant moral panic over violence and adult content in video games, leading to the creation of the ESRB rating system in 1994.
* ''VideoGame/DragonQuest'' took [=RPGs=] down a completely different path. Its emphasis on story and simplistic combat was a major culture shock for American gamers when they got their hands on it (Western [=RPGs=] at the time consisting mainly of [[ExcusePlot shallow stories]] and cripplingly complex gameplay), but it definitely had a following, and it spawned the subgenre we now refer to as the [[EasternRPG JRPG]].
* The {{Xbox}} Live service (and its child service, the Xbox Live Arcade) provided two previously rare functions on consoles -- it allowed for the onset of downloadable content expansions to console games, and it allowed for the download of small games directly to a console's hard drive, starting with titles such as Namco arcade games. With the Xbox 360, this eventually allowed for the download of entire Xbox games, but this and several other download networks ushered in a new era of independently produced games, which themselves are sometimes deconstructions and reconstructions of classical video-game concepts. The industry has essentially come full-circle.
* For the InteractiveFiction genre, ''VideoGame/{{Photopia}}''. Before ''Photopia'', games often used MindScrew surrealism or HighFantasy loosely bound by a huge StoryArc. After ''Photopia'', plot and puzzles became more important to the feel of a game, and slice-of-life realism overtook surrealism as the most popular environment in InteractiveFiction.
** The release of Inform (and ''much'' more so Inform 7) revolutionized the medium, if not the genre. It made it possible for non-programmers to write InteractiveFiction software.
* UsefulNotes/{{Steam}} did a lot to revive PC gaming in the TurnOfTheMillennium. Before it became popular, PC developers were fleeing to consoles en masse due to both the growing threat of piracy and, later, the backlash that intrusive {{DRM}} systems caused within the gaming community. Steam offered not only a relatively consumer-friendly form of DRM, but a whole slew of other features (unified friends lists, [[CosmeticAward achievements]], etc.) that had previously been exclusive to consoles. As a result, developers felt more confident releasing their games on PC through Steam, with the knowledge that they were not only tougher to pirate, but that, even when they were inevitably pirated, the pirate copies would lose their Steam functionality in the process.
** Steam also helped to create the market for indie gaming by offering a way for small developers to get their games to consumers without the costs and hurdles associated with retail stores. XboxLive Arcade and PlayStationNetwork quickly followed its lead, spreading the indie love to console gamers.
* You have ''Franchise/TokimekiMemorial'' to thank for DatingSim girls who actually have personalities beyond "living love doll".
* ...and ''VisualNovel/{{Kanon}}'' to thank for giving the ''male protagonist'' a personality, as well as (and the two are connected) making PornWithPlot [[HGame eroge]] just as marketable as PornWithoutPlot games (though the developers had previously done ''ONE -kagayaku kisetsu e-, Moon.,'' and ''Dousei'' before forming [[Creator/KeyVisualArts their own studio]], none of these games had the impact that ''Kanon'' had).
* ''VideoGame/BaldursGate'' is widely regarded as having saved the WesternRPG genre from slow extinction, setting up a RealTimeWithPause engine to replace the then-standard turn-based mechanics and putting a strong emphasis on story and CharacterDevelopment. Since then, strong writing has been expected of [=WRPGs=], and purely turn-based games are almost never released anymore. As a side note, those in the know also credit Baldur's Gate for saving its parent franchise, ''TabletopGame/DungeonsAndDragons'', from the tar pit that it had been driven into in the 1990s.
* ''VideoGame/TheLegendOfZeldaI'' was the first console game to use a battery-backup save feature and codified or outright named a huge number of tropes used in {{action adventure}} games ever since. The complexity of games after this point would never be the same again, as it was now possible to make a game that couldn't be beaten in a few hours.
* ''VideoGame/MetalGearSolid'' went a long way towards moving action games away from having nothing more than an ExcusePlot, instead making the story an integral part of the gaming experience. The story, voice acting (particularly in a time when almost every game's voice acting ranged from mediocre to awful), and CharacterDevelopment were particularly pointed out for praise and those three things noticeably made the gameplay sequences even more intense, particularly the {{Boss Battle}}s. Not to mention that it also examined some surprisingly adult subjects--like PTSD and nuclear proliferation--which would have been unheard-of a decade before it came out.
* SurvivalHorror games had a number of major game-changers.
** ''VideoGame/{{Resident Evil|1}}'', of course, was the big one. There had been antecedents like ''VideoGame/ManiacMansion'', ''Franchise/AloneInTheDark'', and ''VideoGame/{{Phantasmagoria}}'', but ''Resident Evil'' made the genre into a showcase of what the new PlayStation console could do. It embedded a heavy AdventureGame influence in the genre with its key hunts, puzzles, and inventory management, established {{zombie|Apocalypse}}s as the mook of choice for many games, and spawned a wave of imitators and [[Franchise/ResidentEvil a long-running franchise]].
** One of the most successful of said imitators, ''VideoGame/{{Silent Hill|1}}'', introduced a more psychological take on the genre inspired by Creator/StephenKing and Creator/HPLovecraft, with [[ReligionOfEvil evil cults]], demonic forces, and the town being an EldritchLocation. It, too, spawned [[Franchise/SilentHill a successful series]], and influenced a lot of the more explicitly supernatural takes on the genre.
** In the mid-late '00s, survival horror was thought to be a dying genre, unable to compete in the increasingly big-budget gaming marketplace. And then came ''VideoGame/AmnesiaTheDarkDescent'', which revolutionized indie horror and almost singlehandedly put the genre back on the map. Many of ''Amnesia''[='=]s design elements (an unarmed and highly vulnerable protagonist, heavy use of InterfaceScrew) form part of the DNA of its many imitators.
* The huge critical and commercial success of ''VideoGame/GranTurismo'' in 1998 proved that sim racing could be deep and realistic, yet if made accessible and fun enough, could be as mass-market as ''VideoGame/MarioKart'' and ''VideoGame/DaytonaUSA'', and opened the doors for the sub-genre to co-exist and succeed next to its arcade racing breathren.
* While they're far from the first BulletHell games, the Windows-era ''VideoGame/{{Touhou}}'' games effectively redefined the ShootEmUp genre, especially within the doujin shooter scene; since 2002, it's hard to find a doujin shmup or even a commercial one that ''doesn't'' fill the screen with intricate bullet patterns. Of course, TropesAreNotGood; some feel that the saturation of bullet hell games makes it difficult to find more "classical" shooters ever since ''Touhou'' popularized bullet hell.
* ''VideoGame/{{beatmania}}'' is not the first RhythmGame, but it introduced the idea of scrolling notes, something that has become the standard for the genre, and has been reflected through other Konami rhythm games like ''VideoGame/DanceDanceRevolution'', non-Konami Asian-developed rhythm games such as ''VideoGame/PumpItUp'' and ''Franchise/LoveLive: School Idol Festival'', and finally, Western rhythm games such as ''VideoGame/{{Frequency}}'', ''VideoGame/GuitarHero'', and ''VideoGame/RockBand''.
* Before ''VideoGame/NeedForSpeed: Underground'', arcade racers involving licensed vehicles, especially previous ''NFS'' games, were just games that gave the opportunity for players to enjoy the coolest cars in some fantastic environments in illegal street races, although it was nothing too crazy. You're just driving a car, winning races, and running from police. EA Black Box's ''Underground'', with some thanks to the popularity of ''Film/TheFastAndTheFurious'', brought in ''organized'' illegal street racing to the gaming world with modified tuners decorated in vinyls, [[NitroBoost nitrous oxide tanks]] providing a means to accelerate quicker, storylines to keep things interesting (even though they were cheesy as Hell), changed powersliding to drifting with special events revolving around them, and added in some drag racing events, all to enjoy from the safe, legal comfort of players' homes. This made both ''NFS'' and arcade racing more than just driving a nice car either from point A to point B or around closed looped tracks to the eyes of many fans, especially [[NewbieBoom new ones]]. ''Underground 2'' and 2005's ''[[VideoGame/NeedForSpeedMostWanted Most Wanted]]'' helped reenforce this mindset with {{Wide Open Sandbox}}es and the latter's ''re''introduction of police chases (the two ''Underground'' games took place [[AlwaysNight exclusively at night]], which gave a somewhat unrealistic excuse for why the illegal street racing was not picked up on by police). Like the ''Touhou'' example however, TropesAreNotGood, because not every arcade racing game fan cares about (what they may call) {{Rice Burner}}s, and after Black Box stopped being ''Need for Speed''[='=]s main developer thanks to their botching of ''[=ProStreet=]'' and ''Undercover'', the franchise went into a dark period where fans would argue whether or not the series should move away from the ''Underground'' style or return to it. [[CriticalDissonance This affected the fan reception of the otherwise critically-acclaimed]] ''Shift'' sub-series and the Creator/{{Criterion|Games}} entries of ''Hot Pursuit'' and ''[[VideoGame/NeedForSpeedMostWanted Most Wanted]]''.

[[folder:Western Animation]]
* In Creator/WarnerBros [[WesternAnimation/LooneyTunes cartoons]], Creator/TexAvery revolutionized both the Warner cartoons and the animation industry itself. At a time when Warner and almost all other studios were hell-bent on imitating Creator/{{Disney}}, and in which Warner cartoons in particular were suffering from deathly mediocrity, Avery came along in 1935 with his zany, faster-paced, smartassed, [[NoFourthWall fourth-wall-breaking]] comedy, and cartoons haven't been the same since. If you watch the Warner cartoon library in sequence and look at what the studio was doing by 1937 or '38, it's amazing to think that this same studio had been producing terminally boring cartoons just two or three years earlier. When Warner cartoons finally became funny, they had Tex to thank for it.
* ''WesternAnimation/TheDoverBoys'' (1942) is a double turning point for American animation. It marks the point were Creator/{{Warner|Bros}}'s animators stopped aping Creator/{{Disney}} and started experimenting with much more stylized action. It also marks the point when Creator/ChuckJones went from the junior director who did the ''Sniffles the Mouse'' cartoons to a major innovator.
* The short lived ''[[WesternAnimation/MightyMouse Mighty Mouse: The New Adventures]]'' (1987-1988) completely overhauled the expectations of what a television cartoon could do and began the practice of cartoonist-controlled animation and en-masse pop culture references.
* ''WesternAnimation/TheSimpsons'' (1989-) struck a huge blow against the AnimationAgeGhetto, proving that animated shows based around adult humor can be successful and popularizing the animated sitcom, followed by ''WesternAnimation/SouthPark'', ''WesternAnimation/FamilyGuy'', ''WesternAnimation/{{Futurama}}'', and too many others to count.
* ''WesternAnimation/BatmanTheAnimatedSeries'' (1992-1995, 1997-1999) allowed comic book superhero animated series to move past the AnimationAgeGhetto of the ''WesternAnimation/SuperFriends'', with heroes and villains that have complex motivations and (often) tragic back stories, and spawned a very well-remembered [[Franchise/{{DCAU}} franchise]]. It also proved that an animated show could be darker and deeper and have epic story lines while still appealing to children, and without alienating adults, which remains a major aspect in action/adventure shows to this day. Finally, it should also be noted that it was the first TV cartoon not set in the Old West (okay, so a few episodes ''were'' set there, or in similar locales) to feature realistic handguns instead of ''StarWars''-inspired laser blasters.

[[folder: Real Life]]
* When Creator/GaiusJuliusCaesar crossed the Rubicon with his army rather than surrender to his rivals he made all but inevitable the fall of the Roman Republic and the birth of UsefulNotes/TheRomanEmpire. The very shape of Western Europe (and thus by extension some of the shape of the rest of the world) were set from one course to another by one man's personal ambition.
* TheBlackDeath decimated Europe's population in the [[TheLateMiddleAges mid-14th century]] with repercussions felt for decades. Some of these still felt today, according to various scholars, may have included:
** The foundations of the [[UsefulNotes/{{Christianity}} Protestant Reformation]] and the weakening of Church authority in general
** A rise in [[AggressiveCategorism anti-Semitism and other prejudices]]
** The end of feudal economy and the rise of the [[ATouchOfClassEthnicityAndReligion middle class]]: Because laborers and craftsmen were fewer and could therefore demand higher wages, allowing them to accumulate wealth.
** The rise of paper and printing, as lawyers forced to settle a large number of estates began to wish that more of everything was written down, which increased demand for people who could write, which led to people looking for faster ways to produce documents. Eventually, they hit upon the printing press.
** The Agricultural Revolution: In order to increase the efficiency of food production, which the plague had squeezed. Also, great lords realized that running larger farms with hired hands was more efficient than serfdom.
** The Industrial Revolution--Indirectly, as a result of several of the above factors; the accumulation of wealth in the hands of craftsmen (which allowed them to start profit-making businesses that eventually turned into industries), the Protestant Reformation (which encouraged a burst of new thought in all directions, and also led to the establishment of the community of English Dissenters, who it just happened were mostly craftsmen, and whose response to Anglican discrimination was to invent the modern world), and the Agricultural Revolution (which freed up labor to work in factories when industrialization happened, and also created ''fabulous'' wealth for farm-owning nobles, many of whom bankrolled industrial ventures basically because they could).
** People of European ancestry having greater resistance to HIV.
*** The plague also returned periodically for centuries afterward, leading to boom/bust population cycles which didn't really end until the colonial age.
* The FallOfConstantinople to the Ottoman Turks in 1453 is widely considered by historians to mark the official end of TheMiddleAges and the final nail in the coffin of UsefulNotes/TheRomanEmpire (the Byzantines always considered themselves to be Romans, referring to their territory as [[UsefulNotes/ByzantineEmpire Romania]]), which had existed for nearly 1500 years if one combines the ruling years of Ancient Rome and the Byzantine Empire together.
** The massive outflow of Greek scholars from Constantinople greatly influenced and accelerated the birth of TheRenaissance in Europe.
** The sudden removal of the Byzantine Empire as a buffer-zone between Christian Europe and the Muslim Middle East, as well as the removal of the main overland trade-link between Europe and Asia, led to rapid advancements in warfare and seafaring technology within Europe for the first time in centuries.
** The fact that the Ottomans were now blocking the Silk Road led European navigators to pursue alternative routes to the riches of the Far East, which brings us onto...
* Perhaps most famous of all, UsefulNotes/ChristopherColumbus' discovery of the West Indies in 1492 was TheBeginningOfTheEnd for every major civilization in North and South America, along with much of the native populations. At the same time, northern Europe, which had been a cultural backwater for ''centuries'', entered a new era of vast riches and world domination.
* The Peace of Westphalia (1648), which ended the UsefulNotes/ThirtyYearsWar, originated the modern conception of state sovereignty (including territorial integrity and modern diplomatic relations), not just for the states involved, but all future states as well. It also removed ThePope and the Roman Catholic Church from European politics for good, finishing what the Black Death had started two centuries prior.
* UsefulNotes/TheAmericanRevolution (c. 1774-1783) decisively changed international politics forever. It was the first modern democracy, and thus the trope maker for much of what we now think of as Western democracy. It directly or indirectly inspired revolutions for nearly a century and a half (from 1776 to 1918) - in particular the anti-monarchist nature of most of these revolts. It arguably represents the point at which guerilla warfare and firearms first met. And finally, it was the first time that an imperial European power was defeated by a non-European one. It was also the first example of a nation dominated by people of obvious European extraction, speaking a language from Europe, nevertheless declaring themselves a separate, non-European nation.
* The US Constitution's Bill of Rights and the French Declaration of the Rights of Man and of the Citizen, both of which were first drafted in 1789, are the {{Trope Codifier}}s for the modern concepts of liberal democracy and {{human rights|Issues}}. While some of those rights had appeared in the Magna Carta in the fourteenth century (though many of them had previously suddenly lapsed halfway across the Atlantic for British colonial subjects), the 1789 documents took what were historically viewed as peculiar customs of the English (and Welsh and Scots and Irish, but nobody on the Continent paid any attention to those) and turned them into universal rules. The American Bill of Rights and French Declaration of Rights declared the rights they defended to be inherent, "natural" human rights, with which the state could not legitimately interfere, rather than being the merely traditional "Rights of Englishmen" guaranteed by Magna Carta.
* The Hurricane of 1900 that struck Galveston, Texas sent it into a long decline while turning UsefulNotes/{{Houston}} into a booming port town. NASA and oil would finish the job. The construction of the Houston Ship Channel played a significant role in the shift as well.
* King John (the real-life king behind the RobinHood tales) manged to screw things up quite badly in England; botched wars, high taxes, and getting the entire nation excommunicated for a few years. His frustrated and angered barons united and forced John to sign the Magna Carta (Great Charter). Now the monarchs had to at least be accountable to the nobles. The Magna Carta also established concepts like due process of law being required before stripping a non-serf of land and property, limitations on the king's powers, and even a provision where a council of 25 nobiles could ''overrule'' the king's decree. It became the kiss of death for absolute monarchy, and the beginnings of parliments.
* The Great San Francisco Earthquake (1906) for UsefulNotes/{{California}}. Before the quake, UsefulNotes/SanFrancisco was the largest city on the West Coast, and UsefulNotes/LosAngeles' population was less than a million, nowhere near the second largest city in the United States. The quake and the Hollywood boom were instrumental in shifting the population southward.
** A second turning point in TheEighties came when San Francisco started attracting computer technology firms, partly due to Apple, and partly due to Berkeley and Stanford's top-notch computing laboratories. Then the Internet went mainstream, and the San Francisco Bay Area is now considered a mecca for computing startups and cutting edge tech. On the downside, the split between the sheltered, highly paid techies and the lower-paid non-technology workers has led to skyrocketing rents, shuttered landmarks, and a nasty cultural divide.
* For Western if not world history, UsefulNotes/WorldWarI. Although the American Civil War was arguably the first "industrial" war, World War I was pivotal (and traumatic) for how it oversaw the realization of a total war fueled by industrial production and weaponry. Beyond even military technology and tactics, World War I brought about the collapse of the great autocratic multinational empires that had once dominated Europe's history - Russia, the Ottoman Empire, and Austria-Hungary - and made representative democracies based around a nation-state representing one historical/ethnic group the ideal if not the norm (with a couple of big exceptions...). Then, World War I and its aftermath was key in raising nationalist resentments and economic hardships that would nourish the Fascist movement. At the same time it brought about not only the collapse of Tsarist Russia, but the failure of the democratic Russian state that immediately succeeded it and the rise of the Soviet Union, transforming the driving force in world history from the competition between Europe's colonial empires to the struggle between democratic-capitalist, Fascist, and Communist ideologies. Finally, the war gave the world the League of Nations, the doomed but still important precursor to the United Nations.
* The Statute of Westminister in 1931, which redefined the relationship between the United Kingdom, the British Monarchy, and the various dominions which had once been colonies, marked the peaceful end of the most widespread empire in human history as TheBritishEmpire became [[UsefulNotes/TheCommonwealthOfNations the (British) Commonwealth]].
* After UsefulNotes/WorldWarII (1937/1939-1945) the world system of international relations was restructured drastically, with a new emphasis on not just sovereignty (already codified by the Peace of Westphalia) but (legal) equality between states. [[TheAlliance The old alliances]] of Europe were finished (UsefulNotes/WorldWarI had previously shown how destructive they could be) in favour of new ones like {{NATO}} and the UsefulNotes/UnitedNations. It also discredited Anti-Semitism (at least in the West) to a great extent, and the led directly to the creation of UsefulNotes/TheEuropeanUnion. It also saw the end of American isolationism and saw the drastic increase of the US military in all branches.
* On the 13th of September, 1989, a non-Communist government was formed by the Polish parliament, and the Soviet Union declined to force them to do otherwise. This kicked off TheGreatPoliticsMessUp: within ''weeks'', the entity variously called the Eastern Bloc, the WarsawPact, the great enemy everyone had been planning to fight in WorldWarIII... simply went away. Just over a year later Germany was reunited, and a year after that the Soviet Union itself finally went into the dustbin of history. Western democracies were stunned to discover that the UsefulNotes/ColdWar was over, had never turned hot, and they'd won.
--> '''Film/AustinPowers''': Oh, smashing, groovy, yay capitalism!
* The terrorist attacks of September 11 brought about WarOnTerror and redefined the relationship between the U.S. government and the Muslim world. In addition, it also triggered a series of game-changing reforms in the U.S. intelligence community.