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->''"Si vis pacem para bellum."''
-->-- '''Latin adage''', translated as "If you wish for peace, prepare for war"

So, you have an idea, it's beautiful and you want to fulfill it. Let's say, for example, you want peace. So, how are you going to fulfill it? Fight a war.

Put it basically, you're doing the exact opposite of what you're trying to fulfill.

This comes in two setups, but leads down to the same point:
# You want to fulfill X, so you do Y, which is completely opposite to X. (the page quote)
# You want to stop X, so you do X. (For example, you want to stop war, so you start a war, so when you finish it, you can disarm everyone)

As [[LogicBomb hypocritical]] as it may sound, sometimes this is the only possible choice, and some people will [[HypocrisyNod even acknowledge it]].

Some will know this with the phrase "Fight fire with fire", which this trope is (in Setup 2), but this trope also includes the ideology of the action, not just the methods alone, but, of course, it's not totally necessary to have the ideology to back it up. This will be frequently invoked in the MotiveRant of the OmnicidalManiac who will explain that he is trying to kill everyone so they don't get killed by some other means, or even by someone else using the same method.

Compare TurnTheOtherCheek, when allowing someone to hurt you can be a BadassPacifist tactic that stops them from hurting you, and ZerothLawRebellion, in which this trope is utilized by a logical program.



[[folder:Anime & Manga]]
* Many ''Franchise/{{Gundam}}'' characters
** In ''[[Anime/MobileSuitGundam00 Gundam 00]]'', the protagonists seek to end war via "armed interventions" -- in other words, attacking warlike parties and shutting them down with the overwhelming power of their Gundams. Both their enemies and the more savvy members of their organization {{Lampshade}} how hypocritical it all sounds.
** ''[[Anime/MobileSuitGundamWing Gundam Wing]]'' has Zechs desire to cause such intense devastation to Earth that war loses all appeal. In [[TheMovie Endless Waltz]] this is partially the reason Wufei switches sides and fights against the Gundam Pilots, which is explained more in supplimentary materials.
** ''[[Anime/MobileSuitGundamAGE Gundam AGE]]'' has Lord Ezelcant decide to end war forever by... staring a huge war. [[spoiler:His SocialDarwinist agenda is even worse. He wants to purge humanity of warlike tendencies. Except the people who live through wars and disasters tend to be the ones who ''fight the hardest'' to survive.]]
* ''Manga/{{Bleach}}'': During the Blood War arc, it's revealed that Quincy have [[spoiler:developed a way to seal a shinigami's final release (or "bankai"). To test its capabilities, several captains allow their bankai to be sealed... except that the Quincy actually ''[[PowerParasite steal]]'' [[PowerParasite the bankai]] and use them against their owners. Worse still, when Kisuke Urahara found a way to [[AssimilationBackfire turn the stolen bankai against the Quincy that stole them]], thereby not leaving the Captains at a horrible disadvantage, it was then revealed that having stolen bankais also functioned as a PowerLimiter, preventing the use of the Quincy Vollständig. The advantage they got back was nullified on the spot.]]
* ''Franchise/CodeGeass'' plays this one very straight. Early in the second season, [[DarkMessiah Zero]] publicly admits that he [[NecessarilyEvil became evil because he was convinced it was the only way]] to defeat the evil Britannian empire. This culminates in his [[spoiler: ZeroApprovalGambit, where he commits atrocity after atrocity to focus all of the world's hatred on to him, then has himself killed to destroy it.]]
* ''Franchise/{{Naruto}}'':
** Pain grand plan to bring true peace is get people to see first-hand the horrors of fantastic nuclear warfare and make war much less likely by virtue of mutually assured destruction. He flat out states that his plan is a stop-gap measure, and he expects them to resume fighting and nuke each other once they've forgotten how terrible it is. And eventually revert to peace for short periods before doing it all over again.[[InsaneTrollLogic "True peace" really.]]
** "Salamander" Hanzo, a legendary shinobi with a reputation as TheDreaded, claimed his warmongering ways sprang from an attempt in his youth to unite the land under him. And as you could imagine Hanzo's wars just made the division in the shinobi world worse (since he lost interest in his original ideals early on and became a paranoid monster that oppressed his people) and was actually directly responsible for driving aforementioned Pain insane in the first place.
** [[spoiler:Sasuke Uchiha seems to have decided to go on an insane path of his predecessors, beginning his revolution which according to him to end all wars in the world. His master plan to do it, to put the world into a perpetual state of war against him that would only last as long as he continues to perpetuate the hatred itself.]]
* ''LightNovel/CrestOfTheStars'' The Ahb take the position that humanity will be inevitably be destroyed in a galactic war if left to themselves. So they decide to conquer everyone and incorporate them into their Empire, denying all other races the ability of hyperspace travel so that there won't be any war. Tactics used to accomplish this salvation include blowing away the atmosphere of rebellious planets. [[DesignatedHero And the series is on their side.]]
* Light Yagami of ''Manga/DeathNote'' commits mass homicide in order to put an end to all crime.
* In episode 21 of ''Anime/GenesisOfAquarion'', Sirius declares that "the reason I fight is to create a world free of fighting, where beauty prevails."
* Paradox from ''Anime/YuGiOhBondsBeyondTime'' wants to use Duel Monsters to stop Duel Monsters from being made.
** The [[YuGiOhTheAbridgedSeries abridged]] version sums it up nicely:
-->'''Paradox:''' Pwotagonists! I challenge you to a card game!
-->'''Yusei:''' You mean the thing that's going to destroy the world?
-->'''Paradox:''' Yes! That.
-->'''Yusei:''' Seems kind of hypocritical.
* Chris from ''Anime/SenkiZesshouSymphogear'' uses her heavily armed PoweredArmor to end wars and fighting by beating thouroughly anyone armed at all.
* In ''Manga/MahouSenseiNegima'', the group "Perfect World" wants to save the MagicWorld from its inevitable impending collapse by destroying it first, sending all its inhabitants to their "perfect world" that is suspiciously afterlife-like.
* The [[AbsurdlyPowerfulStudentCouncil Miyaji High Student Council]] employs this strategy against the unwanted Miyaji Cardfight Club in [[Anime/CardfightVanguard Cardfight!! Vanguard]]. By sending "assassins" against said club, they hope the club will cease to exist once they beat them in their own game. Needless to say, this has yet to succeed, prompting the vice president to take more extreme measures in sabotaging.
* In ''Anime/VisionOfEscaflowne'', Emperor Dornkirk's method for creating a world free of war mostly consists of invading sovereign nations by military force.

[[folder:Audio Plays]]
* In the ''AudioPlay/BigFinishDoctorWho'' audio ''Industrial Evolution'', the BigBad is a Luddite who wants to destroy Earth's technology. He does this by encouraging the uncontrolled growth of nanotech, so people will start blaming it for all their problems and reject it. He acknowledges the hypocrisy of this but claims it's justified. (He is unaware of the greater hypocrisy [[spoiler: that he himself is a machine planted on Earth by forces unknown]]).

[[folder:Comic Books]]
* ''ComicBook/{{Watchmen}}'': in order to stop people from killing each other, [[spoiler:make it look like an outside force (aliens) are going to attack them. By killing a whole lot of people]].
* ''ComicBook/DCOneMillion'': in order to stop [[spoiler:Solaris's]] plot to destroy the past, the heroes have to [[spoiler:build him]].
* In ''ComicBook/{{Hellboy}}'', a sea-witch captures Hellboy and plans on killing him because she's afraid someone will take his [[TheRightHandOfDoom Right Hand of Doom]] and use it to destroy the world. This gets lampshaded by Hellboy himself.
* Mr. X of ''ComicBook/MegaMan'' wants to invoke this with Dr. Wily, encouraging him to continue trying to destroy things with his robots in order to keep humanity from building more robots and causing more destruction in the future.

[[folder:Fan Works]]
* In the ''Manga/DeathNote'' [[AlternateUniverseFic AU]] ''Fanfic/ThoseWhoStandForNothingFallForAnything'' Light becomes a CorruptPolitician in order to put an end to corruption.
* In ''FanFic/RosarioVampireBrightestDarkness Acts III and IV'', Hokuto claims that his plan is to bring about peace, and that all life on Earth, human and monster alike, is a plague; therefore, in order to achieve true peace, Hokuto intends to revive [[EldritchAbomination Alucard]] and kick back and watch as Alucard kills every living thing on the planet.
* In the ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' story, ''FanFic/FlashFog'', Ponyville is threatened by the accidental release of a huge mass of experimental and highly dangerous fog. After trying everything else she can think of to disperse it, resident fog expert Fluttershy decides to try saving Ponyville from the fog by ''letting'' it roll through Ponyville and into the Everfree Forest, where she hopes the wild magic permeating the place will negate the pegasus magic in the fog which makes it so hazardous.

[[folder:Films -- Live-Action]]
* In ''Film/DemolitionMan'', cop 20th century John Spartan is thawed out in the future to catch 20th century criminal Simon Phoenix on the basis of "Send a maniac to catch a maniac." Then it turns out Simon's escape was arranged by Raymond Cocteau, who wanted him to assassinate the leader of outlaws threatening his peaceful society... and create enough chaos for an excuse to turn it into an even more rigid and "perfect" one.
* The BigBad of ''Film/MissionImpossibleGhostProtocol'' is a nuclear weapons specialist who is convinced that mankind will keep building more and more powerful weapons until it inevitably wipes itself out in nuclear war. So he seeks to prevent this by...starting nuclear war ''right now'' while weapons are not powerful enough to ''completely'' wipe out mankind in the hopes that human civilization will be so traumatized that they will never do it again.
* In ''Film/{{Paycheck}}'', the machine lets politicians see there's going to be a war against a foreign nation... so they start a pre-emptive war to defeat that same nation, in order to prevent it. Somehow.
* In ''Film/{{The Avengers|2012}}'', Nick Fury shoots a bazooka at a fighter pilot to prevent him from [[NukeEm nuking New York]]. ''Webvideo/CinemaSins'' describes it as "Nick Fury shoots a missile at an American to stop him from firing a missile at Americans".
** Used in another MCU movie, ''Film/ThorRagnarok''. [[spoiler: The only way to stop Hela from destroying pretty much everything else through her conquest is to summon Surtur and let him destroy Asgard with her there.]]
* The Operative in ''Film/{{Serenity}}'' wants to create a perfect world without sin, no matter how many innocent children he has to kill in the process. An oddly self-aware example, in that he freely admits there's no place for a monster like him in his intended paradise.

* ''Literature/{{Frindle}}'' combines this with ReversePsychology. A young boy is trying to popularize the term "frindle" as an alternative for "pen," [[spoiler:and a disliked teacher is secretly rooting for his act of rebellion, but she doesn't think he has much of a chance on his own. She therefore [[StreisandEffect bans the use of the word in school, so that the other students will use it as a way of spiting her]].]]
* Literature/TheWheelOfTime: Throughout the series, the characters have been trying to prevent the [[BigBad Dark One]] from breaking free of [[SealedEvilInACan his prison]]. In the twelfth book, it's revealed that [[spoiler: in order to keep the Dark One sealed away, they first need to break the seals on the prison, so they can remake the seals even stronger.]]
* In the Literature/{{Dragaera}} series, we learn that the Morganti weapons, which devour the souls of their victims, were created by the Serioli to make war so horrible that no one would ever fight again. It worked... but only for the Serioli, who have a very alien way of thinking. Dragaerans and Easterners don't have the same level of conscience that would restrain them from destroying a soul.
* Subverted in ''Discworld/{{Jingo}}'', where Vetinari sees the Klatchian empire is remarkably well prepared for a conflict that supposedly flared up only a few days ago, noting: "If you want war, prepare for war." When Leonard corrects him with the page quote, Vetinari thinks about it and says he doesn't see it.
* The protagonist of ''The Janson Directive'' muses upon this concept (with regards to American foreign policy).
* In ''The Literature/MistbornTheOriginalTrilogy'' Elend who is fighting for the freedom and rights of the people [[spoiler: ultimately declares martial law and seizes absolute power in order to ensure the survival of his people. He determines that he'll do anything to ensure the survival of his people even if it means he's seen as the next [[EvilOverlord Lord Ruler]].]]
* In ''Literature/TheOrphansTales'', kappas are turtle-like beings who keep a reservoir of water in their skulls. If the water ever spills out, they lose all of their strength. Early in history, a brilliant kappa named Yazo became obsessed with proving to her people that they couldn't continue living a life where their water was in danger of spilling, so she regularly drained the water from her head, becoming more and more feeble and weak, until she finally died. The kappa learned from her example and moved to very cold climates, where their water froze and would never spill again.
* In ''[[Literature/WizardOfYurt A Bad Spell in Yurt]]'', the young wizard Daimbert is asked by the queen to make it stop raining, as the king is ill and the rain is affecting his health. Since Daimbert had primarily studied spells that would be practical in a farming community (which is where he thought he would end up), he only knows spells to make it ''start'' raining (to help crops grow). He does, however, know a spell to make it stop ''storming'', so in order to make it stop raining, first he has to cast a spell to turn the gentle shower into a terrible storm, because that's something he can stop.

[[folder:Live-Action TV]]
* In one episode of ''Series/StarTrekTheNextGeneration'', a scientist is trying to convince the Federation that [[FasterThanLightTravel warp drive]] is dangerous, and is damaging space (using similar arguments to how real life greenhouse emissions are damaging Earth), which is particularly bad around her planet since it's a major shipping lane. In order to try to convince the Federation to stop using warp drive, she intentionally self-destructs her ship's warp drive in order to ''cause'' the very damage she was trying to prevent, just to prove her point. As a result of the episode, the Federation begins research into safer drive systems; in the meantime (as a stopgap measure), an order is issued to all Federation ships to restrict travel to warp 5 for non-emergency situations.
** Which is mentioned only twice in subsequent episodes. StatusQuoIsGod, and emergency situations tend to make for more interesting episodes.
** It's revealed that Voyager and other later designs for starships have the non-subspace damaging warp drives, dealing with the issue this episode brought up. However, it's AllThereInTheManual, and it's not specified whether older ships could be refitted with the new warp drive.
* Crichton of ''Series/{{Farscape}}'' showcases just how destructive wormhole weapons are so everyone would stop trying to bully, blackmail, threaten and MindRape the secrets out of his head.
* In the ''Series/StarTrekTheOriginalSeries'' episode "A Taste Of Armageddon", two planets fight a "clean" war by having computers figure out who was killed by each virtual attack, whereupon the designated casualties report for [[NeverSayDie termination]]. Kirk destroys the computers on one side, forcing them to choose between fighting war in the usual messy manner or making peace.
* ''Series/OnceUponATime'' has this in Season 4 with Ingrid/The Snow Queen, who feels that magic users will always eventually be isolated and so she, Elsa, and Emma should be one big happy family with no one else involved. She intends to get Emma in her "family" by helping Emma control her powers...only Emma's never had control problems before. So in "The Snow Queen" she preys on Emma's insecurities to ''create'' control problems that she can then solve.
** Ingrid is shown to have a history of this, often with it not working out. Wanting to convince Elsa that Anna will turn on her, she uses a spell to force Anna to turn against Elsa. Elsa sees right through it. Wanting to convince Elsa that people will turn on her for her powers, she frames Elsa for murder. It fails.
* The whole [=SuperPAC=] saga. In 2012, ''Series/TheDailyShow'' and ''Series/TheColbertReport'' started a [=SuperPAC=] to demonstrate the opacity and lack of rules surrounding the collection, distribution, and spending of [=SuperPAC=] money, by having Colbert "not" collude with Stewart on it, spending the money questionably, etc, with the guidance of their lawyer, Trevor Potter. Then it more explicitly became this trope when they donated some of the [=SuperPAC=] money to organizations dedicated to changing [=SuperPAC=] rules to stop exactly those kinds of shenanigans.

* "Virus Alert" by Music/WeirdAlYankovic plays this semi-subtly. It advocates sending everybody an email warning them about a virus -- the spread of the email, if you think about it, would be kind of like a virus itself. More obvious in [[https://www.youtube.com/watch?v=zvfD5rnkTws the video]], where "forward this message on to everybody" is accompanied by a visual of multiplying viruses.

[[folder:Tabletop Games]]
* In ''TabletopGame/ArkhamHorror'', the spell "Call Ancient One" allows you to awaken the Ancient One instead of waiting for him to awaken on his own. The reason to do this is that you want to fight him at a time of your own choosing, when you know that you have the firepower to [[DidYouJustPunchOutCthulhu punch out Cthulhu]]. Works better against some Ancient Ones than others.
** The spell also removes a large number of Doom Tokens (The Ancient One's "health" in the Final Battle) depending on how many trophies are spent on the casting. Combining enough trophies with an ability to automatically cast a spell can lead to a FlawlessVictory by killing the Ancient One before the first combat round.
* Many members of the Boros Legion in ''TabletopGame/MagicTheGathering'' are dedicated wholeheartedly to the cause of stopping Guild violence with, um, more Guild violence.
* ''TabletopGame/{{Warhammer}}'': Vampire lord Carstein's master plan to prevent Chaos from taking over the world is to kill everyone and raise them as zombies. No emotions, no Chaos.
* In the ''TabletopGame/{{Warhammer 40000}}'' Canon, [[NeglectfulPrecursors The Old Ones]] attempted to destroy the [[OmnicidalManiac omnicidal C'tan]] and restore peace by creating [[ProudWarriorRaceGuy an entire species of bloodthristy, mass-reproducing brutes who understand and desire only war]] and setting them loose on the galaxy. Bonus points for them [[TooDumbToLive forgetting to install an off-switch so that said species immediately began attacking The Old Ones and their allies]] as soon as the C'tan were defeated/hid in their tomb-worlds.
* The Inquisition in ''TabletopGame/AnimaBeyondFantasy'' follows this trope to a T, their members using the very same stuff (magic, psionics, Ki attacks...) they combat -justifying them as gifts given to them by God to destroy heretics and demons-.

[[folder:Video Games]]
* Most of the ''VideoGame/QuestForGlory'' games require you to play UnwittingPawn to the villain's scheme before you can put an end to that scheme. In the second game, this is actually in force by your enemy, who needs "A hero from the north" to fulfill a prophecy, and so send the elementals to test you[[note]]In addition to providing a test of your abilities, it's also designed to get you to a specific place, at a specific time, with a ''specific title'' (Hero). Not knowing that you're a hero from Spielburg, the BigBad plots to ''make you'' a hero, so that you can fulfill a prophecy for him. The only reason he fails is because he didn't know the full, real prophecy[[/note]]. In the third game, you're trying to avert a war between the Leopardmen and the Simbani, but the only way to discover who's trying to incite the war is to let the war actually happen[[note]]Though you don't know that at the time. The majority of the game is spent trying to get a peace conference between the two groups, and when you ultimately succeed, the demons behind the plot are forced to intervene directly, giving evidence of their previously-unconfirmed involvement and setting you on the path to confront them[[/note]]. In the fourth game, the BigBad plots to unleash an otherworldly [[EldritchAbomination Dark One]] that was partially summoned years ago (and the partial summoning is responsible for the sorry state of the surrounding countryside), and to permanently banish the Dark One, the hero has to finish summoning it[[note]]Though in this case, the reason the Dark One must be summoned is because the only person capable of banishing it completely was trapped with the Dark One in a partial banishment, preventing either from gaining an advantage[[/note]].
* The Maymai Alliance in ''Spectral Force Genesis'' wants to stop a war that will ravage the land, but to do it, they'll beat everyone else and then disarm them all.
* In ''VideoGame/AssassinsCreedII'', one of Altair's Codex pages lists what he considers the three ironies at the heart of the Assassins - They seek peace, which they try to obtain through murder. They seek to free the minds of men, but require obedience to a leader and a set of rules. They seek to expose the dangers of faith, but use it themselves. He goes on to say that he is trying to find a way to resolve the contradiction but fears that no solution exists.
* ''VideoGame/GearsOfWar 2'': To stop the Horde from sinking humanity, Marcus and Dom decide to [[spoiler: sink Jacinto faster to take them out, too]].
* ''VideoGame/FinalFantasyVIII'', of course, features the master plan to prevent [[spoiler: Ultimecia from compressing time]]: Let her [[spoiler: compress time]] and jump her ass while she does that.
** In ''VideoGame/FinalFantasyX'', Maester Seymour believes that the [[EldritchAbomination otherworldly entity Sin]] has trapped the world of Spira in a downwards spiral of death and suffering. How will he save Spira's people from this sorrow? [[spoiler: by becoming Sin himself and ''[[PutThemAllOutOfMyMisery killing everyone on the face of the planet]]'']].
* ''VideoGame/PokemonMysteryDungeonExplorers'': Stop time to stop time from stopping. To elaborate more: Stealing a Time Gear from its place will cause time in that area to stop flowing, but [[spoiler: if the Time Gears are not taken from their current location to Temporal Tower, the tower will fall into ruin and time ''everywhere'' will stop flowing.]]
* Fight, VideoGame/{{Mega Man|Classic}}! For everlasting peace!
** What's the best weapon to defeat Metal Man? [[HoistByHisOwnPetard Metal Man's own weapon, of course!]]
* In the ''VideoGame/RType'' series, the iconic Force device is made using embryonic Bydo flesh, creating a nigh-impenetrable shield and multi-functional weapon that is highly effective in destroying Bydo.
* In ''JustForFun/PokemonVietnameseCrystal'', a TranslationTrainWreck of ''Pokémon Crystal Version'', you apparently have to pull the power supply out to start up the PC.
* ''VideoGame/PokemonBlackAndWhite'': Team Plasma wants all Pokémon to be released into the wild, and they'll use their Pokemon to force you to give them up. [[spoiler:Turns out TheManBehindTheMan Ghetsis just wants everyone else to release their Pokémon, so he'll be the only one with Pokémon and can take over Unova with ease.]]
* ''VideoGame/MeltyBlood'': [[TimeTravel Dust of Osiris]]' plan to defy the end of humankind's existence is by ending humankind's existence and leave behind a record of some sort.
* In the ''Franchise/MassEffect'' series, the true reason the Reapers cull organic life in the galaxy every 50,000 years or so? [[spoiler:It was the answer their creator the Catalyst, the first true Artificial Intelligence ever created, came up with to its creators the Leviathans' question of how to prevent synthetic life from wiping out organics. The Catalyst believed that organics would inevitably create synthetic life and just as inevitably come into conflict with it. Such a RobotWar could wipe out life in the galaxy forever. To prevent this, the Reapers wipe out the most advanced races before they create synthetic life, leaving the less advanced species alone. In the process, they preserve said races by using their genetic material to create new Reapers and continue their own genocidal cycle.]]
* ''VideoGame/StarCraftII'': [[spoiler:The Overmind]]'s idea: start a genocidal war to stop a genocidal war. [[spoiler:It seeks someone strong enough to take over the Zerg Swarm, lest the Zerg Swarm will eventually be mind-slaved by the Xelnaga Amon]]. Amazingly, this plan seems to be working in its favor despite everything.
* ''VideoGame/MetalGearSolidPeaceWalker'': Hot Coldman turns out to be a complete nutbar who believes that nuclear deterrence is doomed to fail because no one has the guts to return fire. So his solution is "nuke everyone so no one can nuke anyone".
* ''VideoGame/MetalGearRisingRevengeance'': The goal of the VisionaryVillain in an age where the world is hooked on a global war economy: ''"You still don't get it. I'm using war as a business to get ELECTED! So I can end war as a business."'' He becomes less self-contradictory when he later details that he's totally fine with plunging USA into anarchic civil war as long as it's ''not a business''. Raiden finds his ideas [[YoureInsane completely ridiculous]] either way.
* Lloyd and co from VideoGame/TalesOfSymphonia, after discovering where [[PoweredByAForsakenChild Exspheres come from]], resolve to stop the Desians [[spoiler: and Cruxis]] and stop the manufacture of Exspheres. However, they quickly realize afterwards that, in order to even stand a chance against them, they have to keep using their own Exspheres anyway. [[spoiler: The party continues to use theirs after the game, while planning to give them up after Lloyd finishes his quest to gather every Exsphere on the planet.]]
* Throughout the ''VisualNovel/ZeroEscape'' series, this tends to be a major motivation behind each iteration of Zero.
** In ''VisualNovel/NineHoursNinePersonsNineDoors'', [[spoiler:Past!Akane is trying to survive a Nonary Game. To this end, she causes a time paradox, shifting her consciousness into the future...where she creates ''another'' Nonary Game and risks people's lives to make them play it.]] ItMakesSenseInContext, but it's still morally questionable enough to make [[spoiler:her]] the BigBad.
** In ''VisualNovel/VirtuesLastReward'', [[spoiler:the world will be devastated by people infected with a disease called Radical-6, leading to the deaths of 6 billion people. Preventing it involves creating a Nonary Game and injecting its participants with Radical-6]].
** In ''VisualNovel/ZeroTimeDilemma'', [[spoiler:Brother wanted to release Radical-6 in the hopes that it would stop a religious fanatic that would kill all humans, and not just the 6 billion that would die as a result of Radical-6's effects]].
* In ''VideoGame/{{Bloodborne}}'', [[spoiler: the [[EldritchAbomination Moon Presence]] uses [[DeathSeeker Gehrman]] as a surrogate host to create the Hunt, hoping to undo the madness done by his kind, Mergo. It however backfired and ruined the city of Yharnam instead, some became the Beast they used to hunt, and some were mentally tormented and driven to madness. Even if you managed to succeed him and decided to continue the struggle against the Great Ones, you would one day share his fate and be treated as an enemy by the other Hunters.]]
* The very core of the backstory to ''VideoGame/AmnesiaAMachineForPigs'': [[spoiler: Your player character, having received a vision via a magical mask of the brutal wars coming in the 20th century, murders his two sons to save them from their prophesised deaths at the Battle of Somme. He then constructs the titular machine to slaughter the inhabitants of London, and presumably from there all humanity, and replace them with twisted [[PigMan porcine monsters called "Manpigs"]].]] There are some hints that he's being manipulated by an ArtifactOfDoom, though.
* ''VideoGame/ResidentEvil6'': As revealed during Leon's story mode, Simmons orchestrated the C-Virus outbreak in Tall Oaks to prevent President Benford from revealing the truth behind the Raccoon City Incident, believing that if he did so, the U.S. would lose all of its global authority and the world would descend into chaos. Leon and Helena call him on it, pointing out that his idea of stopping a ''possible'' disaster was causing an ''actual'' one.
* ''VideoGame/MetroidPrimeTrilogy'': This is recurring theme with Phazon based enemies, against whom Phazon-based weaponry is usually the most effective. In fact, the [[FinalBoss Final Bosses]] of ''Prime'' and ''Echoes'' can only be damaged with Phazon-based [[EleventhHourSuperpower Eleventh Hour Superpowers]]. ''Corruption'' takes this further by giving you Phazon weapons early on, which continue to be the best way to deal with Phazon wielding enemies found throughout the game.
** ''VideoGame/MetroidPrime2Echoes'': According to the lore, this was the idea behind the Luminoth's creation of the Dark Beam; killing dark creatures by overloading them with dark energy. Unfortunately, this didn't work, so the Luminoth created the Light Beam instead, to much better results.
* ''VideoGame/Persona5'': A major plot element is a series of mental shutdowns and psychotic breakdowns that have been occurring across Tokyo and causing accidents and deaths. [[spoiler: They are being caused by Akechi Goro in his Metaverse guise as "Black Mask," while in the real world he acts as the "Detective Prince" who figures out the causes of the accidents and enjoys fame and fortune for his apparent brilliance.]]

[[folder:Web Original]]
* Parodied in ''WebVideo/ToBoldlyFlee'' when [[Film/SupermanII General Zod]] takes control of [[Film/BattlefieldEarth Terl's]] operation to kill WebVideo/TheNostalgiaCritic (who's turned his house into a spaceship). He quickly decides that the best way to fight the Critic is to turn Terl's own CoolShip into a house.

[[folder:Web Comics]]
* Janis from ''Webcomic/{{Erfworld}}'' is a Hippymancer who wants to see Erfworld at peace. She's become convinced that this won't happen until [[http://archives.erfworld.com/Book%201/154 things get broken even worse than usual]].
-->"Lord Parson doesn't want to lead it. I respect him for that, but I'm also really quite frightened about what will happen to the whole world if he takes command again."\\
One corner of Janis' mouth drooped, and she touched his shoulder.\\
"It will break. I told you. He may war so terribly that it breaks war itself. That is my own hope." She smiled sadly, "And in the long run, I have few others."

[[folder:Western Animation]]
* In ''WesternAnimation/MyLittlePonyFriendshipIsMagic'', Twilight Sparkle falls into this twice:
** In the episode "[[Recap/MyLittlePonyFriendshipIsMagicS2E3LessonZero Lesson Zero]]", she [[SanitySlippage literally goes crazy]] with worry about not turning in her weekly friendship report to Princess Celestia on time and, after failing to find a problem to solve, decides "If I can't ''find'' a friendship problem, I'll '''''make''''' a friendship problem!"
** The episode "[[Recap/MyLittlePonyFriendshipIsMagicS2E20ItsAboutTime It's About Time]]" has her get a visit from her future self which makes her think that there is going to be a terrible calamity by next Tuesday. The episode has her growing increasingly frantic and sleep-deprived, trying to figure out what this calamity ''is'' so that she can stop it. Finally, she gets so desperate that she decides the only way to prevent whatever is going to happen is to find a spell to stop time itself, so that next Tuesday can never come. [[spoiler:The big punchline to the episode is that there never was any future calamity on its way, and the whole plot was kicked off by a StableTimeLoop caused by 'future' Twilight going back to the past in a failed attempt to tell herself not spend the next week freaking out.]]
* An episode of ''WesternAnimation/KungFuPandaLegendsOfAwesomeness'' has Po consider releasing a SealedEvilInACan so he can defeat it and restore his fan club's faith in him. After a brief ImagineSpot he opts against it, but then accidentally releases it when he drops the jar it was in.
* The episode "Jet" of ''WesternAnimation/AvatarTheLastAirbender'' features one rather similar to the Vietnam situation in the RealLife section. An Earth Kingdom village has been taken over by the Fire Nation, and the rebels are determined to save it. Their solution? Blow up the dam and kill everyone in the village.
* At the end of season 3 of ''WesternAnimation/ReBoot'', Mainframe is falling apart thanks to Megabyte's reign. When a Game approaches, Bob decides to let it crash the system instead of play it. Mainframe is too far gone for system repairs -- their only recourse is the User rebooting the system after it crashes. To save Mainframe, they have to let it and everyone in it die first.
* ''WesternAnimation/KingOfTheHill'': In "Hank's Bully", a young boy named Caleb and his family move into the neighborhood, and immediately begins bullying Hank, calling him names like "Dusty Old Bones, full of green dust" [[BrokenRecord over and over]]. Hank tries to tell Caleb's parents, [[AdultsAreUseless but they brush it off]], [[BitchInSheepsClothing since he acts so nice around them]]. Eventually, Hank decides the best way to have Caleb's parents put an end to it is to have Bobby mimic Caleb's behavior, [[IronicEcho with Hank repeating the parents' statements]] once they complain about it.

[[folder:Real Life]]
* Windows 95 and later: click the Start button to Shut Down the computer.
* UsefulNotes/WorldWarI's description as "The War to End All Wars" sounds like an example, but in reality peace wasn't the goal of the instigators. The term comes from the vain hope of the survivors that its horrors would put people off warfare for good. [[UsefulNotes/WorldWarII Obviously that didn't come to pass.]]
* UsefulNotes/AmericanCivilWar's General Sherman had an idea decades early during the conflict and said he wanted to make [[WarIsHell war so frightening for the South]] that they'd never want to take up arms ever again. By all appearances he succeeded, since there has not been another American Civil War in the century-and-a-half since then.
* Peter Arnett quoted a United States major as saying, "It became necessary to destroy [[http://en.wikipedia.org/wiki/Bến_Tre the town]] to save it."
* Mao Zedong's defining phase, "political power flows out the barrel of a gun" came from this passage: (''Selected Works of Mao Tse-tung, Vol. II'', pp. 224-225)
-->[O]''nly with guns can the whole world be transformed. We are advocates of the abolition of war, we do not want war; but war can only be abolished through war, and in order to get rid of the gun it is necessary to take up the gun.''
* Back-fires are controlled fires used to stop the progress of an uncontrolled one (by using controlled fires to consume the fuel for the uncontrolled fire), and the origin of the phrase "fight fire with fire."
** This is also periodically done to ''prevent'' major fires, by creating low-intensity fires to burn off much of the dry undergrowth and dead foliage that contribute to major fires. Sometimes these controlled burns [[NiceJobBreakingItHero get out of control]], making it a controversial tactic.
** It's ''inverted'' when naturally occurring fires are stamped out early, meaning that the underbrush does ''not'' get burned off naturally. Eventually a fire starts in such a fuel-rich environment and rapidly grows into a huge blaze.
** A certain logic problem revolves around this trope. You're stranded on an island covered entirely with a forest. A lightning strike starts a fire at one end of the island, and the wind is causing the fire to slowly spread across the rest of the island. How do you survive? [[spoiler:Pick up a branch from the underbrush in the forest, go near the fire and light the stick. Run to the other end of the island and light the forest on fire there. It will burn out soon, as it can't spread against the wind. You can then use this burnt-out section as a safe spot when the main fire comes.]]
* Cromwell's English republic had this as its motto - ''Pax Quaeritur Bello'', or "Peace is sought through war".
* This happened all the time during UsefulNotes/TheFrenchRevolution. Many of the Revolutionaries in fighting for and arguing for the things they wanted to put in place resorted to means which contradicted their ideals:
** In order for the Revolution to create a society as per "The Declaration of the Rights of Man" which asserted the protection of civil liberties and right to property as well as freedom of religion, they had to reform feudalism. To reform feudalism they came up with the scheme of creating a new national church and seizing property, i.e., violate the very principles they are trying to erect. This was a key cause for the counter-revolution, as this interference was resented by the rural population, the Vendeeans. Pro-revolutionary historians admit that it was a less than perfect approach to separation of Church and State.
** The Declaration also stated that France would not declare or provoke war nor would it conquer other sovereign nations. However, in order for the revolution to succeed against opposition, many politicians like the Girondins decided that France should invade neighbouring regions to "spread the Revolution". Danton, despite initially opposing the war, admitted that it was a chance for France to reclaim its "natural frontiers", and expansionist rhetoric accompanied idealistic notions of spreading the Revolution, almost entirely without irony.
** Robespierre opposed capital punishment, but only during peacetime. During wartime, [[UtopiaJustifiesTheMeans killing the King and counter-revolutionaries was necessary to arrive at the capital-punishment-free peacetime]]. Emmanuel Joseph Sieyès saw himself as a liberal and moderate, rather than a firebrand revolutionary. Eventually he felt France was being too unstable and that there needed to be order. So [[JumpingOffTheSlipperySlope he decided to mastermind a military coup d'etat]] and went shopping for a general to serve as his puppet. The one guy who was ''conveniently'' available : UsefulNotes/NapoleonBonaparte. Such reversals, drastic and dynamic were common and bitterly {{lampshaded}} by Pierre-Victurnien Vergniaud at the trial of the Girondins:
--> ''"Citizens, we have reason to fear that the Revolution, like Saturn, will successively devour all its children, [[{{Foreshadowing}} and finally produce despotism, with the calamities that accompany it]]."''
* Bruce Hoffman suggested in his 1998 book ''Inside Terrorism'' that the trend of escalating violence would soon lead to an act of terror so awful that the world's sympathies would turn against the perpetrators. Terrorism would get so [[MyGodWhatHaveIDone horrific]] that terrorists would abandon it.
* US forces in Iraq had more success against the foreign jihadists in the mid-2000's when their acts of terrorism became so brutal that the local armed rebels got sick of them and began opposing them.
* In May 2015, scientists [[http://www.bbc.co.uk/news/health-32551873 successfully cured people of the C. difficile virus]] by injecting them with... more C. difficile. The injected C. difficile had been programmed not to produce the toxins that caused the virus' symptoms, and occupied the spaces in the gut that the virus normally inhabits, preventing the real virus from settling there.
** And in a general sense this trope is the principle behind vaccines. The body is either infected with, or merely exposed to a milder relative of the microbe responsible for a disease. Sometimes, this even leads to a brief illness in itself, but because the immune system is trained to fight the microbe, the body can't be infected again.
* It is common for bomb squads to deal with a suspicious package or bag that might be a bomb by blowing it up in a controlled explosion.
* [[http://en.wikipedia.org/wiki/Reactive_armour#Explosive_reactive_armour Explosive Reactive Armour]] attached to armored fighting vehicles uses one explosion to neutralize another explosion in Anti-Tank warfare.
* One method used to rapidly clear lanes through a minefield is launch a long rope of explosives along the planned route and blow it up to blow up the mines.