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Sometimes, a writer inadvertently creates an AlternateHistory, which causes problems when referencing later events. The reason? Real life has simply progressed beyond the fictional events, meaning that the work suddenly becomes inaccurate. Adventure thrillers are especially vulnerable to this, as they are often written TwentyMinutesIntoTheFuture. Sometimes, the writer will refer to later events such as 9-11, InSpiteOfANail. In other cases, what was a series of adventure novels experiences a GenreShift and becomes some kind of science-fiction or true Alternate History.

Anything that doesn't have TheInternet is prone to this, which is everything written before the mid-90s but set after. Anything vaguely similar to the 'net as we know it, tends to be limited to looking up a remote, probably centralized, database. The idea of it being a many-to-many medium doesn't seem to have occurred to many people until it actually happened[[note]]Which is mostly due to the fact that the Internet as it is today evolved, rather than being specifically developed: the ''designers'' of [=ARPAnet=] had no idea what it would become until it actually did[[/note]]. For examples of fictional not-quite-Internets, see TheAlternet.

Ironically, the title of this article and the accompanying photo are a downplay of the trope. The initial run was immediately intercepted and destroyed, but not before one of Truman's cronies got a hold of one, providing for the famous photo op. The fact that the Tribune was an arch-Republican paper hostile to Truman didn't help any matters.

The science-fiction version is a special case, where dates or [[ScienceMarchesOn rates of technological advance]] become invalidated by the march of time. {{Zeerust}} is an aesthetic version, where "futuristic" designs wind up dated.

The title comes from a famous newspaper headline. The Chicago Tribune printed the predicted winner of the 1948 presidential election on its front page. [[AssumedWin By morning, the headline was proven wrong.]]

See TheGreatPoliticsMessUp for a particularly frequently encountered example.

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!!Examples:

[[foldercontrol]]

[[folder: Comic Books ]]

* ComicBook/MartianManhunter was originally from a thriving and prosperous Mars. After space probes found Mars to be barren, a RetCon was introduced to explain what had happened to J'onn's people.

[[/folder]]

[[folder: Film ]]

* ''Film/BackToTheFuture'':
** We'll see in just about one year after this edit what did and didn't come to pass as predicted in Part 2 - [[InvokedTrope not that the film had any pretensions of prescience]]. So far it's predicted flat screen [=TVs=] and hundreds of channels and the increase in popularity and decrease in cost of plastic surgery among a few other things. Oh, and paper newspapers look like they'll still be around too, if only just. On the other hand, we're unlikely to have [[IWantMyJetpack flying cars, hoverboards, realistic holographic displays, dust-repellent paper]], and [[ArsonMurderAndJaywalking 80s cafes]]. And unless the U.S. dollar goes completely screwball in the next year, it won't cost [[RidiculousFutureInflation $50 for a Pepsi]]. Lawyers will probably get to keep their jobs, too.
** Also, a Cubs-Miami World Series in 2015 will be impossible as long as both franchises remain in the National League. (Of course, the fact these teams had the two worst records in the NL in 2013 would've made a World Series by either squad unlikely, anyway.) Good job predicting there'd ''be'' a Miami team though (the Florida Marlins were formed in 1993 and became the Miami Marlins in 2012), even if they got the name wrong -- the logo implies that they would be the Gators, unlikely in any case given that there was already a well-known college football team by that name.
** In one that crosses with FunnyAneurysmMoment, "Queen Diana visits Washington". Not only Princess Diana left the royal family through a divorce and died tragically, but HMTheQueen looks like she'll still reign in 2015.
** One of the more amusing mispredictions: The continued existence of Pontiac. Why they even decided that a Toyota dealership would switch to selling American cars in the first place is a mystery, especially since '80s futurism was heavily inspired by a JapanTakesOverTheWorld mentality.
* ''Film/TwoThousandTwelve'' predicted...[[TheEndOfTheWorldAsWeKnowIt well]]...

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[[folder: Literature ]]

* Deliberately spoofed in ''MoreInformationThanYouRequire'', which is apparently set in some kind of AlternateHistory where, among other things, Dewey Defeats Truman, and in the follow-up volume, ''ThatIsAll'', we learn that Hitler drowned while on vacation during the 1930s. Roosevelt was right there and he ''allowed it to happen''.
* Creator/TomClancy's ''Literature/JackRyan'' series gradually developed from a series of "Well, it ''could'' have happened in real life" techno-thrillers into a full-blown Alternate History.
* ''Literature/LordOfTheFlies'' features a nuclear war breaking out sometime in the late 1950s, making it this trope if you block out all the heavy-handed symbolism.
* ''Literature/SometimeNeverAFableForSupermen'' has a nuclear war where there shouldn't have been, though Creator/RoaldDahl is just looking for a convenient time to kill humanity.
* ''Film/TwoThousandOneASpaceOdyssey''.
** And now, its sequel, ''[[FirstInstallmentWins 2010]]''.
*** Someone needs to set an alarm to come back and edit this page in 51 years.
** All of the ''Space Odyssey'' series have already been invalidated this way, one way or another. For example, the first three books all feature a still-existing USSR; the backstory of 2061 involves a revolution in UsefulNotes/SouthAfrica in the 2030s which overthrows the apartheid regime; then of course there's the invention of HAL...
*** ArthurCClarke went on record to state that the 'sequels' were actually stories taking place in [[AlternateUniverse alternate universes]] when [[HistoryMarchesOn current events surpassed his stories]].
* Creator/IsaacAsimov's novels have RidiculouslyHumanRobots, but no personal computers and (in most novels) even no television.
** His short story ''History'', published in 1941, mentions that Hitler died on Madagaskar.
* Averted in a Creator/MarkTwain [[http://www.cracked.com/article_18846_6-eerily-specific-inventions-predicted-in-science-fiction.html short story]].
* Creator/LarryNiven's Literature/KnownSpace has humanity midway through colonizing the solar system and beginning to get slowboats to nearby habitable systems ready by this point in its history, as well as widespread death penalties to force organ donation.
* ''Literature/NineteenEightyFour'' predicts a decidedly dystopian '84 that did not come to pass. Not that we wanted it to anyway. Although it did predict iPods and flatscreen [=TVs=]. And the NSA's [[http://en.wikipedia.org/wiki/Room_641A warrant-less surveillance of everything on the internet]]. Of course, it wasn't specifically said that the book takes place in 1984 (Winston explicitly says he's ''not sure'' what year it ''really'' is) -- Orwell simply flipped the last two digits of the year it was published (1948). The book was originally going to be called "The Last Man in Britain"; a trace of this remains when O'Brien tells Winston that "if you are a man, then you are the last man". And given Big Brother's ability to lie about ''everything'' to the point of altering the definition of "truth," [[FridgeBrilliance there's no way for anyone in-story to be sure what year it is, either.]]
* ''Literature/DreamPark'' by Niven & Barnes has California decimated by an earthquake and associated tsunami in 1985. The second sequel bumped this to 1995, after which the authors threw up their hands and let it stand as an alternate-history Verse.
* RobertHeinlein is often credited with inventing the idea of an author linking his works into a single timeline and coining the term "future history." None the less, he eventually had to declare his Future History to be an alternate universe (and he then introduced inter-universal travel so those characters could visit worlds more like our own).
* Brilliantly averted in GKChesterton's ''TheNapoleonOfNottingHill.'' After an introduction in which he pokes fun at authors and pundits who make authoritative-sounding predictions about the future only to ''inevitably'' run afoul of this trope, he announces that he is setting his story the better part of a century in the future, and that apart from [[OneBigLie one major, and deliberately silly, change to the operation of the British government,]] he is assuming that the future will be exactly like the present. The marvelous thing is that, a hundred years later, his book actually ''does'' stand up to this trope ''far'' better than most of his contemporaries. Make of that what you will.
* ''Literature/TheManWhoBroughtTheDodgersBackToBrooklyn'' was written in 1981, but largely takes place in 1985-88. A few of the changes are necessary for the story to work; for instance, the LA Dodgers' mid-Eighties stats ended up being pretty good in RealLife, but had to be abysmal in the book to help the characters buy out the team.
** A minor aversion occurs with the 1988 World Series; the Dodgers make it to the Series in the book, just like they made it to the actual '88 Series.
** Played straight with the book's central premise, though. As of 2014, the Dodgers are still in Los Angeles.

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[[folder: Live-Action TV ]]

* ''[[Series/TwentyFour 24]]''. Season 1 was written and filmed pre-9/11 but was set in 2004. By the second season, 9/11 had happened, and the Department of Homeland Security suddenly existed when it hadn't before.
* ''{{Space 1999}}'', like Arthur C. Clark, was covered later by stating it had taken place in an AlternateUniverse.
* ''Franchise/StarTrek'':
** The franchise initially had the Eugenics Wars occurring in the 1990s. There were a couple attempts to fix this one. [[Series/StarTrekDeepSpaceNine DS9]]: [[Recap/StarTrekDeepSpaceNineS05E16DrBashirIPresume "Dr. Bashir, I Presume"]] claimed that it actually happened later sometime, while a series of books suggested that they were "secret wars" where the actual historical events were being manipulated from behind the scenes. One series of comics just says "screw it, we're going all in" and has Khan ''destroying Washington D.C. and Moscow'' in 1992.
** The FixFic ''Fanfic/ReimaginedEnterprise'' states that they ''did'' happen, and they were open wars, but that a lot of it was our-universe conflicts and incidents that here had a connection to the Augments (for instance, there was an intervention in Somalia in 1992, but here it was an intervention against the Khanate).
* ''Series/SabrinaTheTeenageWitch'' spoofed the famous ''Dewy Defeats Truman'' moment when Jenny won the race for Class President against [[AlphaBitch the popular cheerleader, Libby]].

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[[folder: Video Games ]]

* ''VideoGame/ModernWarfare'' predicted a civil war in Russia by 2011 which obviously did not come to pass[[note]]This is less a case of HistoryMarchesOn, and more AlternateHistory: Infinity Ward didn't actually think that Russia would devolve into civil war, but rather used it to tell a story[[/note]].
* ''VideoGame/CallOfDutyBlackOps2'' predicted that David Petraeus would be Secretary of Defense in 2025. Given the fact that Petraeus was caught up in [[YourCheatingHeart an extramarital affair]] in late 2012, that seems really unlikely.
* The original ''VideoGame/GhostRecon'' predicted a third world war between the U.S. and a resurgent Soviet Union would break out, and opens with the Russian invasion of the Republic of Georgia in 2008; while such a conflict did indeed occur in Georgia that year with Russia, it did not escalate into the larger conflict that is the focus of the game.

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