This is a fairly common stock motivation, in which a character who has been abused, persecuted, or otherwise mistreated in the past is acting to make sure that this sort of thing never happens to them again. This can encompass anything from [[TakeALevelInBadass taking a few levels in badass]] to ensure they'll be able to defend themselves against future threats, to attempting to TakeOverTheWorld and overthrow the oppressive institutions that made them miserable, to [[SafetyInIndifference refusing to care]] enough about anyone or anything to be hurt. The character may also wish to spare others from suffering like they did, but there needs to be at least some element of preemptive self-protection involved to fit the trope.

It's a common motivation for the behavior of the BrokenBird. See also FreudianExcuse and MyGreatestFailure. If the hurt is romantic in nature and new relationships are avoided for this reason, it's TheFirstCutIsTheDeepest. See also HopeIsScary, where recovering from despair is feared because it doesn't allow this, and WeAreNotGoingThroughThatAgain for a (usually) more comedic take on the same sentiment.


[[folder: Anime & Manga]]
* The backstory for ''LightNovel/CrestOfTheStars'' has the [[SpaceElves Abh]] overthrowing their human creators and masters, then going on to conquer most of the known universe, while in the process of conquering the rest.
* In all adaptations of ''Manga/AstroBoy'', Dr. Tenma's son is killed. In grief, Tenma builds a robotic replica of his son, Astro Boy, and because he has plenty of MadScientist in him, augments the android with ridiculous amounts of weaponry so that his new son can defend himself when threatened. In a more direct version of this trope, Astro constantly sees robots getting mistreated or destroyed, often himself included, and spends much of his time defending robots without harming humans.
* In ''Manga/{{Berserk}}'', the trope is invoked by those become Apostles. Since a [[ArtifactOfDoom Behelit]] is sure to appear in the hands of its owner when they reach their DespairEventHorizon, it is only natural that most willingly sacrifice their loved ones in order to become physically and emotionally invulnerable.
* This is the reason Minatsuki acts the way she does in ''Manga/DeadmanWonderland''. To keep anyone from abandoning her the way her mother did, she deliberately acts as crass and cruel as she can so that no one will ever get close to her.
* The manga tie in for ''VideoGame/DevilMayCry 3'' suggests that this is Dante's main motivation. After losing his mother to demons, he didn't get stronger to protect other people, it was so nothing like that could happen to him again.
* This is the reason why Haruka of ''Manga/KotouraSan'' would decide to be alone before the start of the story; several {{Despair Event Horizon}}s on, she [[BrokenBird cynically]] thinks she would [[DoomMagnet doom]] ''[[DoomMagnet every living being]]'' [[DoomMagnet that she cares about]], so she decided to be with ''nobody'' so that they would not be hurt--and by extension, herself being hurt by abandonment from someone she cares about again. The downward spiral was only broken by Manabe.
* The central conflict of ''Anime/NeonGenesisEvangelion'' is essentially this, with every major character having some aspect of this as their motivation. Pretty much all of the characters' {{Angst}} is caused by characters being unable to connect with other people for fear of being hurt. Shinji and Asuka being in love with but too frightened of each other to try and have a relationship leads to TheEndOfTheWorldAsWeKnowIt, that Shinji unleashes because he ''believes'' that no one loves him and everybody would hurt him. SEELE's end goal is essentially an attempt at this taken to its LogicalExtreme.
* Revy of ''Manga/BlackLagoon'' became what she is due to the horrible treatment she received at the hands of those in authority, from her drunken asshole of a father at home to the police on the streets. Revy's obsession with power is a direct response to her feeling of powerlessness during those years as a kid, and she ''never'' wants to go back to that again.
* ''Manga/OnePiece'':
** This is the reason behind Boa Hancock's behaviour. After [[spoiler:she and her sisters were made slaves in their childhood]], she put on a strong, cruel image to prevent such a thing from ever happening again. It caused her surrogate mother figure to fear Hancock had really grown cold as ice, but fortunately, Luffy's actions proved that it wasn't the case.
** [[spoiler:Charlotte Katakuri is a SlaveToPR who has cultivated an image as TheParagon that he projects in public so he won't be ridiculed like he was as a child for his "pelican eel" mouth (which he now conceals with a scarf) -- in reality he is every bit as gluttonous and hedonistic as the rest of his family. This is only amplified by the fact that the Charlotte Family is a BigScrewedUpFamily that has no issue mocking and demeaning any physical deformities their siblings have (as Pudding and her third-eye can attest to). He only manages to break out of this mindset during his fight with Luffy, who saw Katakuri's true self (including his mouth) and didn't give a damn about any of his flaws, only about Katakuri's amazing combat ability as an opponent]].
* This trope leads to the tragic ending of ''Anime/Danganronpa3: Despair''. Chiaki's [[LoveInterest friend]] Hajime disappears off the face of the earth, much to her sorrow. Months later, the same thing is about to happen to [[TeamMom Chisa]], so Chiaki panics and makes some [[LeeroyJenkins really crappy decisions]] in an attempt to save her.
* In ''Anime/DragonBallSuper'', this is the motivation for Jiren's MightMakesRight philosophy. After losing first his family and then his comrades to an evildoer, he decided that a person's own strength is all they can rely on in life. He then closed himself off emotionally and pushed himself to become the strongest mortal in existence, all so he would never be vulnerable like that again. When Goku's Ultra Instinct form begins to overpower him, he starts having traumatic flashbacks, and eventually ''fires at the audience'' to spite Goku's belief in ThePowerOfFriendship.

[[folder:Comic Books]]
* ComicBook/{{Magneto}}, when he's given sympathetic motivations. He's a [[UsefulNotes/TheHolocaust Holocaust]] survivor who doesn't want mutants to face the kind of genocidal [[FantasticRacism bigotry]] he endured in his youth. Though it does kind of go against him when he has no qualms about doing that to humans.
* Some portrayals of ComicBook/PoisonIvy in Franchise/{{Batman}} - she got mutated when she fell for a guy PlayingWithSyringes - now she is obsessed with controlling men.
** In the ''Cacophony'' storyline, this is Batman's justification for saving ComicBook/TheJoker's life at the end, in spite of Gordon's protests. He tells Joker that he became Batman so he could save people from dying, no matter what.
* In the ''ComicBook/ElfQuest: Siege at Blue Mountain'' arc, this seems to be Winnowill's motivation for wanting to take all of the pure-blooded elves somewhere they can never be hurt again. For many of them, it doesn't end well.
* In ''ComicBook/TheDeathOfSuperman'', Doomsday's motivation for killing everything he sees is that he was created via a horrific experiment that involved dying ''multiple'' times (we're talking hundreds if not ''THOUSANDS'' of deaths). He thinks everything in the universe is a threat to his life and he's terrified of dying again.
* ''ComicBook/{{Supergirl}}'' story arc ''ComicBook/RedDaughterOfKrypton'' starts out when Supergirl, who feels she's been manipulated and betrayed by everyone since she showed up on Earth several months ago, promises herself that she'll not be hurt again, and if life tries to hit her again, she's hitting back.
-->'''Supergirl:''' Dad. [[Franchise/{{Superman}} Kal]]. H'el. Siobhan. They ALL let me down. They all broke my heart. And now THIS. No more. Nobody gets away with hurting me ever again. Not THIS time!

[[folder:Fan Works]]
* ''Fanfic/ABoyAGirlAndADogTheLeithianScript'': In this ''Literature/TheSilmarillion'' fanfic, secondary character Maiwe did not want to give another chance to her formerly verbally abusive boyfriend, [[ReformedButRejected refusing believing that Edrahil had changed during the war and was a different person now]] and having sworn that she would not be hurt again. [[TheHero Beren]] warned her that attitude may hurt her anyway.
* In the ''Anime/NeonGenesisEvangelion'' fic ''Fanfic/ACrownOfStars'', Asuka has been hurt by virtually everyone she knew (her parents, her step-mother, her guardians, the boy she liked...). As a result of it she does not want to let herself to fall in love because she does not want to be hurt again. Another character warns her that attitude will get her hurt anyway.
* One of Harry/Tristan's driving motivations in the ''Franchise/HarryPotter'' fic ''FanFic/TheJadedEyesSeries''. [[NoPlaceForMeThere Though he believes it's too late for himself]] he figures he can still save other magical children from suffering the same fate [[HumansAreTheRealMonsters at the hands of muggles]].
* In the ''VideoGame/TheKingOfFighters'' fic ''FanFic/SoreGaAiDeshou'', Andy, as a result of constantly being shunted back and forth between numerous foster families, has difficulty opening up to people and forming any real attachments; his personal motto is "Don't get attached, don't get hurt."
* ''Fanfic/ThousandShinji'', a ''Anime/NeonGenesisEvangelion''[=/=]''TanbletopGame/{{Warhammer 40000}}'' crossover fic: One of the reasons of [[AntiHero Shinji]] to [[spoiler:want to TakeOverTheWorld]] is he does not want anybody hurting him or [[LoveInterest Asuka]] ever again.
* In ''Fanfic/TheBridge'', Aria Blaze muses that she wants to become stronger so that no one will ever be able to scare her again.

[[folder:Films -- Animated]]
* Meg from ''Disney/{{Hercules}}'' refuses to admit that she may have feelings for Hercules due to the fact that her previous boyfriend left her when she [[DealWithTheDevil gave her soul to Hades]] [[UngratefulBastard to save his life]].
-->'''Meg:''' Sometimes, it's better to be alone. Nobody can hurt you.
* ''Disney/{{Zootopia}}'': After [[spoiler: being bullied and rejected by prey animals as a child]], Nick decided to never let others get to him ever again.

[[folder:Films -- Live-Action]]
* Scarlett O'Hara in ''Film/GoneWithTheWind'': "As God is my witness, I'll never be hungry again!"
* This has been used as Film/{{Spartacus}}' motivation in several fictionalisations.
* ''Film/{{Hitch}}'': Part of Hitch's backstory - in his younger days he loved and was very devoted to a woman who broke his heart by cheating on him with a cooler guy, with the reason that he was too average. In explaining it, he blatantly says he set out to ensure the same thing never happens to anyone else or himself - he reinvents himself to become the very pinnacle of charm, and then becomes the "Date Doctor" to give average guys real romantic chances that would otherwise never come their way.
* The Pigeon Lady in ''Film/HomeAlone2LostInNewYork'' tells Kevin that she was hurt by a man who didn't love her back, so never let herself the possibility of having her heart broken again. That's why she was alone, [[spoiler: that, and the pigeon poop.]]
* Magneto from the ''Film/XMenFilmSeries'', is both a Holocaust Survivor and mutant "lab rat", which pushes him towards DoUntoOthersBeforeTheyDoUntoUs regarding mutant suppression by the humans.

* In ''Literature/ABrothersPrice'', after her abusive husband Keifer Porter died, Princess Trini does not want to marry again, as a new husband could be just the same. (While he was bad for the whole family, he raped and tortured only Trini, and was more subtle with the others) This causes problems because it prevents her sisters from marrying, too - all sisters marry one husband, due to male GenderRarityValue in the setting. She is also protective of people who are in danger of facing the same fate she did - when she is told that [[spoiler: the Porters intend to make an offer for Jerin]], she neglects her own safety to help. [[spoiler: By agreeing to marry Jerin herself.]]
* The main character of ''Literature/TheKingkillerChronicle'' mentions this as one of several motivations for attending WizardingSchool. (How truthful he was being is currently unknown--especially since the series isn't finished yet.)
* Creator/AlanDeanFoster's ''The Man Who Used The Universe''. Kees vaan Loo-Macklin creates a criminal empire and a legitimate business empire and manipulates too many beings to name (both human and alien). He does this because he was abandoned as a child and grew up in a series of foster homes where he was mistreated because of his appearance, and was determined never to be helpless and mistreated again.
* This is what sparks Tiffany Aching's desire to become a witch in her ''Literature/{{Discworld}}'' books. Specifically, there was an incident in which an odd but otherwise harmless old woman was turned out of her home, mistreated by the locals, and eventually died out in the cold because they believed her to be a witch. Tiffany's response was to want to become a ''real'' witch so anyone who ever wanted to pull a stunt like that again would have to go through her first.
* Although she says "never be ''hungry'' again", a good deal of Scarlett O'Hara's ruthless behavior throughout the second half of ''Literature/GoneWithTheWind'' can be attributed to this, as it's repeatedly stated that she's genuinely terrified of returning to the days of cold and poverty.
* In ''Literature/ThisImmortal'', Diane lets slip that she used to be a pleasure girl on Taler and it wasn't a pleasant experience, which caused her hatred of all [[HumanoidAlien Vegans]] and was her motivation to join [[LaResistance Radpol's Returnist movement]].
* ''Literature/WordsOfRadiance'' (second book of ''Literature/TheStormlightArchive''): Kaladin is terrified that if he lets any lighteyes know about his new Surgebinding powers, they will somehow take them away. He knows it's impossible, but that does not easy his worries in any way. [[spoiler:This leads to him breaking his vows [[{{Irony}} and losing his powers]]. He recovers them after he realizes what he did wrong and swears a new Ideal]].

[[folder:Live-Action TV]]
* House in ''Series/{{House}}'' seems to be like this at times. His relationship with Stacy sent him into one period of emotional disengagement. Then when after his relationship with Cuddy goes bad, he refuses the affections of his green-card wife, apparently out of fear that sex with anyone who actually likes him (rather than hookers) might lead to attachment which will hurt him again. Of course, if you showed him this page on TV Tropes and said that it applied to him, he'd probably give you a BreakingSpeech about what a moron you are for thinking it.
* ''Series/DoctorWho'':
** John Lumic, who has some undisclosed and presumably painful terminal illness, decides to enforce UnwillingRoboticisation upon himself and humanity in order to eradicate death and emotion.
** Professor Lazarus from "The Lazarus Experiment" tried to create a device to avoid death due to his experiences during UsefulNotes/WorldWarII. [[GoneHorriblyWrong It didn't quite work out]].
* The Gua in ''Series/FirstWave'' were once enslaved by another race but eventually drove their oppressors off their world. They even renamed their entire race based on their victory: "Gua" means "the power to overcome". They pre-emptively conquer other worlds to ensure no one else is ever able to threaten them again. One of their leaders, Joshua, eventually sides with humanity when he realizes that humans also possess "Gua".
* ''Series/OnceUponATime:'' Several characters, but special mention goes to Cora, who, after being forced to kneel and apologize to Eva, decides not to stop until everyone else is on their knees.
* The Narn from ''Series/BabylonFive'', in the early seasons. Their motivation, which prompts their bullying, their expansion, their desire to crush the Centauri, is largely about ensuring that they'll never again be at the mercy of the Centauri. Commander Sinclair even explicitly compares them to abused children who have learnt to hit back and now abuse others in turn.
** [[{{Irony}} Ironically]], the Centauri themselves: they used to be a peace-loving race before the Xon, the other sentient race from their homeworld, literally showed up from nowhere to enslave the Centauri and kill anyone who opposed. After the invasion (and a brief alien invasion), the Centauri killed every last Xon, took the stars as conquerors, and ''invented the [[ColonyDrop mass drivers]]'' (whose use is considered a war crime).
** Also, the reason many Humans despise aliens and/or are obsessed with acquiring overwhelming military force: during the [[HopelessWar Earth-Minbari War]], Mankind was brought to the verge of extinction by the Minbari, and Earth's allies deserted them out of fear of the Minbari, and no Human want that to repeat.
*** It's also the reason Babylon 5 exists at all: the Earth-Minbari War started due a formidable case of PoorCommunicationKills[[note]]When [=EarthForce=] encountered the ship of the Grey Council, the Minbari ship opened the gunports as a sign of respect. The Minbari leader, fearing this would be misinterpreted, ordered to close the gunports as soon as he found out, but a power spike was mistaken for the weapons being charged, and, as the Minbari had not replied to earlier attempts at communication (mainly because they didn't understand English), the Human captain ordered to open fire ''right as the Minbari were being ordered to close the gunports'', killing their leader[[/note]], and after the war the Humans built the Babylon Stations as a meeting point where all races would be able to meet in peace and learn about each other.
* ''Series/StarTrekDeepSpaceNine'':
** The Founders (a race of changelings) use this as justification for running the Dominion. They tell Odo that millennia earlier, they were peaceful, but were met with brutal distrust and were hunted down. Thus, they founded the Dominion to ensure they would never be in a position of weakness ever again, breeding the remorseless Jem'Hadar to do their bidding on lesser species. However, there are subtle hints through the show that the prejudice against changelings did not start until ''after'' the Founders started their empire-building.
** The Bajorans suffered a brutal fifty year occupation at the hands of the [[ANaziByAnyOtherName Cardassians]] and ex-freedom fighters like Major Kira make it quite clear they will never suffer such an indignity again. Indeed, this is what kick starts the series, as the first step to guaranteeing the Cardassians stay away is the Bajoran provisional government requesting Starfleet establish a naval presence at Bajor, so any attacks on Bajor will be an automatic act of war against the Federation.
* On ''Series/{{The 100}}'', Lexa's response to the torture and murder of the girl she loved was to stop caring about anyone on an individual level and devote herself entirely to the well-being of her people as a whole.
-->'''Lexa:''' I thought I'd never get over the pain, but I did.
-->'''Clarke:''' How?
-->'''Lexa:''' By recognizing it for what it is: [[LoveIsAWeakness weakness]].

* The Music/SimonAndGarfunkel song "I Am A Rock" seems to describe the feelings of someone who doesn't want to love anymore because they were hurt by it once.
-->Don't talk of love,\\
But I've heard the words before,\\
It's sleeping in my memory.\\
I won't disturb the slumber of feelings that have died.\\
If I never loved I never would have cried.
* ''Music/TheWall'': Pink gradually builds a wall throughout his life to protect him from being hurt emotionally, and realizes later that completing it wasn't such a good idea as it basically isolates him from everyone and drives him mad.
* In the end of "Ruiner" by Music/NineInchNails the narrator [[SuspiciouslySpecificDenial denies even having been hurt]] declaring:
-->''you didn't hurt me nothing can hurt me\\
[[MadnessMantra you didn't hurt me nothing can stop me now]]''
* Mary J. Blige's song, aptly titled "Hurt Again."
* "How to Be a Heartbreaker" by Music/MarinaAndTheDiamonds espouses this attitude:
-->''Girls, we do\\
Whatever it will take\\
'Cause girls don't want\\
We don't want our hearts to break\\
In two\\
So it's better to be fake\\
Can't risk losing\\
In love again, babe''

[[folder:Tabletop Games]]
* TabletopGame/{{Warhammer 40000}} and TabletopGame/{{Warhammer}}: several justifications for falling to Chaos are protection against that god's particular domain. Mostly seen with Nurgle, the god of disease, whose followers are infested with pus-filled growths and oozing sores, but are no longer negatively affected by them, instead reveling in every new pox they develop.
** It's also the reason why Imperium hates aliens so much: during the Age of Strife, aliens, who were allies of us, turned on humanity, caused great destruction, enslaved people, etc. The Emperor decided that all aliens should be destroyed to make humanity's future safe, and frighteningly, his extremist views aren't very wrong.

[[folder:Video Games]]
* Lambda of ''VideoGame/TalesOfGraces''. His plan to KillEmAll is because [[spoiler:everyone he ever knew as a child was either manipulating him for their own ends, or they died trying to protect him]]. Main character Asbel, who went through similar circumstances, breaks down Lambda's plan by asking [[ArmorPiercingQuestion a simple question]]: "AndThenWhat" The [[{{Beat}} hesitation]] on Lambda's part shows he's really having a SuicidalCosmicTemperTantrum.
* Squall Leonhart of ''VideoGame/FinalFantasyVIII''. The reason for his cold, detached demeanor was because [[spoiler: his fellow orphan and sister, Ellone, left him alone as a child and he developed abandonment issues. He feels that, eventually, all friends and family will die or go away, and the only way to avoid the pain from that is to never let anyone in again.]]
* The main antagonists in ''VideoGame/StarControlII'', the Ur-Quan, have this motivation: they were once enslaved and hideously mistreated by [[TheHypnotoad the Dnyarri]], and after winning back their freedom while suffering constant excruciating pain (which protected them from MindControl), they decided the only way to make sure it never happened again was to enslave (Kzer-Za) or exterminate (Kohr-Ah) everybody else first.
* This is Drakath's motivation to become the Champion of Chaos in ''VideoGame/AdventureQuestWorlds'', according to the end of the Music/TheyMightBeGiants event, which saw him being kidnapped (along with the Hero and the TMBG members) by a crazy alien [[TheCollector collector]].
* In ''VideoGame/LeagueOfLegends'', after Professor Stanwick Pididly stole credit for both the creation of [[RobotBuddy Blitzcrank]] and the technology that revived [[AndIMustScream Urgot]], Viktor decided to protect himself from this happening again with his newest accomplishment - the transformation of himself into a killer cyborg. This both [[CyberneticsEatYOurSoul removes]] (mostly) the pain and anger he feels over his inventions being stolen, and demonstrates his own skill in a way that can't be stolen.
* Sebille a (sort-of) former slave in ''VideoGame/DivinityOriginalSinII'' is trying to remove the last vestige of her slavery, the living scar on her cheek, with which her master can continue to control her. By doing this she knows that she can never be used to hunt her own kind again.
* In ''VideoGame/TheSecretWorld,'' reclusive property mogul Nathaniel Winter is revealed to be secretly motivated by this: having grown up neurotic and frightened of almost everything, he resolved to never be afraid again - namely by seizing power by any means available to him. For a while, being rich and connected was enough - but [[BrokenMasquerade then he discovered the Secret World]], and realized that magic could make him even more powerful than before. Unfortunately, with no innate magical talent, he'd need to study for years to harness the power he desired; impatient to [[IJustWantToBeSpecial become the greatest magus who ever lived]], Winter decided to take a dangerous shortcut and infuse himself with magic via mechanical means. [[spoiler: The means of harvesting and infusion was Atlantic Island Park, and the process transformed him into the Bogeyman]].

[[folder:Western Animation]]
* ''WesternAnimation/MyLittlePonyFriendshipIsMagic'':
** Babs Seed. She was bullied mercilessly for her lack of a cutie mark in Manehattan, and during a visit to Ponyville, joined up with resident bullies Diamond Tiara and Silver Spoon to avoid getting bullied there too. Fortunately, the Cutie Mark Crusaders show kindness and acceptance to her condition, and she becomes much happier and calls them her friends.
** Moondancer. After Twilight, the pony she considered her best friend, didn't show up for her first party and moved to Ponyville without a word, Moondancer was so heartbroken that she decided friendship just wasn't for her. Fortunately, Twilight eventually realizes she'd wronged Moondancer and their other friends in Canterlot and returns to make amends. After much effort, her apologies eventually get through to Moondancer and bring her out of her shell.
** [[KnightTemplar Starlight Glimmer]] was heartbroken when her foalhood friend Sunburst moved to Canterlot to study magic once he got his cutie mark, which she blamed for their separation. Starlight vowed to never make another friend fearing that another cutie mark would end those friendships as well, and this event inspired her to purge all ponies of their cutie marks.
* Marceline from ''WesternAnimation/AdventureTime'' went through a LOT, and [[JerkassFacade frightens people to show them she had enough]].
* In ''WesternAnimation/GreenLanternTheAnimatedSeries'', after having her heart broken by Razer, Aya deactivates her emotions to get rid of the pain. Then things get even worse.
* In ''WesternAnimation/StarWarsRebels'', this is Ezra Bridger's motivation, although the way he goes about it [[CharacterDevelopment evolves]]. His parents were taken by the Empire when he was seven, and he survived by refusing to rely on or connect to anyone. When he joins the ''Ghost'' crew and eventually adopts them as his new family, he becomes very protective of them, and trains to be a Jedi so he won't be helpless to save the people he cares about.
* In ''WesternAnimation/DannyPhantom'', this trope is the origin of [[FutureBadass Dark Danny]]. After losing his parents, sister, best friend, [[MyFriendsAndZoidberg and teacher]], Danny (with former nemesis and new guardian Vlad's help) sought to remove his human half to get rid of the pain and grief that plagued him. Unfortunately, the process turned his ghost half into a remorseless sociopath, who killed his human half, tore out Vlad's ghost side and absorbed it, and went on a ten-year-long rampage.
* ''WesternAnimation/VoltronLegendaryDefender'': In Keith's official vlog, he comes to the realization that the reason he's seldom able to connect with other people was due to his abandonment as a child; now, he pushes other people away before they get the chance to reject him.

[[folder:Real Life]]
* Many nations with a recent or ancient history of being oppressed have carried this sentiment into the modern day, which results in rather thorny foreign policy. The problem is particularly severe in UsefulNotes/{{Africa}} and the Middle East where this trope often leads to violence but many other countries with reputations for being 'hard' or 'rugged' have felt this influence at some point.
** Case in point: UsefulNotes/{{Israel}}, which actually went so far as to print the words "never again" on their first ([[ImplausibleDeniability totally hypothetical]]) nuke, and generally have it as a sort of unofficial motto. This is what happens when your country is founded ''entirely'' by hundreds of thousands of [[{{Shell Shocked Veteran}} shell-shocked survivors]] of one of the most horrific genocides in human history. And add to those numbers the Mizrahi Jews who fled or were expelled from the Islamic world.
** UsefulNotes/{{Finland}}. Basically every able-bodied male Finn (and a lot of women) is trained to be a soldier.
** The [[UsefulNotes/{{Haiti}} Haitian]] revolution was originally put down under UsefulNotes/NapoleonBonaparte, but after [[UsefulNotes/{{France}} the French]] let their intent to re-enslave the Haitians be known, the war re-ignited and eventually led to the end of French rule.
** Nat Turner's Rebellion, which involved killing all of the whites the rebels came across, was started for similar reasons.
** UsefulNotes/{{Russia}} doesn't have much in the way of natural borders to prevent or slow an invasion, as seen when the Golden Horde rolled in from the east back in the Middle Ages, so after that trauma and centuries spent under the Mongol Yoke, its leaders' best defensive strategy was to push Russia's borders as far from Moscow as possible, which naturally led to conflict with Russia's neighbors. Then after the communist revolution, the Nazi invasion during UsefulNotes/WorldWarII was so horrific that the now Soviet Union built up a glacis of subjugated satellite states, a devastating nuclear arsenal, and a military so large that it contributed to the USSR's collapse, all so it wouldn't have to go through something like that again.
* This is often case with scholarly-minded children, especially boys, when they grow up. They are often mercilessly bullied and picked on at school, and once they graduate or otherwise get out of school, they often begin to train in martial arts, self-defence skills and some kind of armed combat to never let the childhood trauma renew. At best, the person may become a BadassBookworm. At worst, a BrokenAce.
** Creator/BasRutten, one of the most famous MMA fighters and commentators, was bullied as a child for his skin condition and scrawny constitution, and it made him start training. One of his partners in Japan, Wrestling/MinoruSuzuki, had a similar childhood.
** Many join the armed forces for this very reason.
*** Similarly some therapists and social workers go into their line of work to prevent what happened to them (whether it be abuse, debilitating mental illness or attempted suicide) happening to anyone else.
** This is also what happens with a number of bullied students that go on school shootings, which normally target their tormentors first in a desperate effort to make the bullying stop. On the other end of the spectrum they may go the nonviolent route and instead [[DrivenToSuicide take their own lives to keep it from continuing]].
* It's been argued that sociopathy and other personality disorders are behavioral adaptations that people develop to cope with extreme situations in childhood and adolescence but which are maladaptive when trying to fit in or survive in society. Anti-social personality disorder sufferers have incredibly diminished empathy and a desire for control, paranoid personality disorder sufferers are pathologically unable to trust and always suspect people are taking advantage of them, Schizoid personality disorder sufferers use fantasy and withdrawal to cope with loneliness etc.
* The horrid impact of UsefulNotes/WorldWarI brought about a common sentiment of "never again" (which was also repeated in a sense after the [[UsefulNotes/WorldWarII second War to End all Wars]]). As history showed, [[ForegoneConclusion it did]].