Hey, guess what? Your [[TheEmpire entire civilization]] lives [[DarkSecret on a lie]]. It might be a secular version of a PathOfInspiration, or maybe no one in the world has ever realized that the AppliedPhlebotinum powering your homes and healing your sick is actually PoweredByAForsakenChild - but in any case, UtopiaJustifiesTheMeans, right?

The publication of this ''verboten'' knowledge by an IntrepidReporter might spell doom for all civilized society, incite universal rebellion, or simply make you GoMadFromTheRevelation.

So be good and don't delve any further.

At a smaller scale, see TownWithADarkSecret.


[[folder:Anime and Manga]]
* ''Manga/FullmetalAlchemist'' has an ''incredibly'' sinister government conspiracy that goes all the way back to the destruction of the ancient city of Xerxes.
* The Union in ''Anime/StrainStrategicArmoredInfantry'', although the BlackBox of their evil research was so secret that, five hundred years later, no one in the military had any idea where exactly Strains and Mimics came from. No one except the DefectorFromDecadence, that is. And they wonder why he snaps and starts trying to kill them.
* ''Manga/GiantRobo: The Day The Earth Stood Still'' has the miraculous Shizuma Drive, which ushers in the Third Energy Revolution and a new golden age for all mankind. Trouble is [[spoiler:the first, hasty test of the Shizuma Drive wipes out an entire country in the Tragedy of Bashtarle, killing uncounted millions of people]]
** Actually, the real dark secret is that [[spoiler:The revered Dr. Shizuma who is credited with the drive actually caused the destruction of Bashtarille by performing the final experiment against the advice and counsel of Dr. Franken Von Vogler, who was presumed lost in the accident -- and who was blamed for the disaster.]] This comes back to bite EVERYONE on the ass.
* The [[AncientConspiracy Lost One Hundred Years]] within the ''Franchise/OnePiece'' universe is kept secret by the paranoid [[TheGovernment World Government]]. Any attempt to learn the lost language to decipher the secrets of the poneglyphs left behind by the long-forgotten civilization (i.e. something close to OUR civilization) that preceded the World Government will result in the [[WhatASenselessWasteOfHumanLife immediate death of the researcher and anyone remotely connected with them]] as well as the obliteration of their research to the point of '''bombing an entire island into rubble'''!
** They destroyed an island for the crime of learning the language that could be used to read ancient texts that might possibly lead them to the truth of what happened during that time period.
* SEELE in ''Anime/NeonGenesisEvangelion'' is running a thousand-year old AncientConspiracy. Not only have they influenced humanity's advancement towards their AssimilationPlot but part of this influence was intentionally causing a global catastrophe (the awakening of Adam in the Antarctic which led to the melting of the polar ice caps and global sea levels rising and destroying all coastal settlements, this plus the resulting wars ending with a death toll of ''three billion'') but covering it up as an asteroid impact. Oh, and the CapturedSuperEntity they worship and want to use for said AssimilationPlot? A sentient terraforming device of alien origin (although they might not realize it themselves, the "sacred" Dead Sea Scrolls are actually an instruction manual misinterpreted as religious text). And the kicker: not only the AssimilationPlot will be what is essentially TheEndOfTheWorldAsWeKnowIt, SEELE's leadership of humanity from behind the scenes subtly influenced society in such a way that no one is 100% sane anymore and global birth rates are dropping rapidly so either they successfully pull out Instrumentality or '''humanity will die out in a few generations'''.
** Another dark secret might be what the [[EldritchAbomination Evangelions]] [[PoweredByAForsakenChild actually]] [[CloningBlues are]].

* There's more than one ''Webcomic/AxisPowersHetalia'' fic that posits the existence of the [[AnthropomorphicPersonification Nations]] ''themselves'' as this trope. Depending on [[DarkFic how dark the story is]], it usually results in mass chaos and WhatMeasureIsANonHuman scenarios.
* In Lord of the Rings fanfic [[http://archiveofourown.org/works/7142897/chapters/16218209 Heart of the Mountain ]], the mountain kingdom of Erebor is this. The protagonists were not in on the secret and are horrified when they find out.

[[folder:Film - Animated]]
* ''WesternAnimation/ThePrinceOfEgypt''. While he acknowledges that slavery exists, Moses freaks when he finds out that his adoptive father was responsible for mass murder of Hebrew babies.

[[folder:Film - Live Action]]
* The Alliance from ''Film/{{Serenity}}'' had buried the fact that some time ago, they [[spoiler:had accidentally killed 99.9% of the population of Miranda with a chemical meant to calm their violent urges, and turned the rest into the horrifically violent cannibal monsters that would become known to the rest of the Verse as the Reavers.]]
* In the AlternateHistory film, ''Film/{{Fatherland}}'', where Nazi Germany won UsefulNotes/WorldWarII, a few people begin to investigate to the various "undesirable" populations who mysteriously disappeared. Of course this means they uncover the Final Solution's death camps.
* In ''[[Film/MenInBlack MIB]]'', it's revealed that not only do aliens live among us, but most modern inventions were actually gifts from alien civilizations, not human creations. Earth is repeatedly in cosmic peril and almost everyone on Earth remains in blissful ignorance.
-->'''K:''' There's always an Arquillian Battle Cruiser, or a Corillian Death Ray, or an intergalactic plague that is about to wipe out all life on this miserable little planet, and the only way these people can get on with their happy lives is that they ''do not know about it.''
* As ObviouslyEvil as TheEmpire of ''Franchise/StarWars'' is, the public ''are'' largely unaware that their Emperor is actually a Sith Lord who engineered the Clone Wars because DespotismJustifiesTheMeans.

* ''Literature/TheWheelOfTime'' has two.
** The Seanchan Empire can attribute its thousand-year history of prosperous expansion to enslaving feared and persecuted magic channelers as children, effectively making them extremely powerful, living tools that can be assigned and taken away by the higher-ups. No one realizes that the Phlebotinum for control only works when the controller has hidden potential to become a channeler. Controllers who learn this go into a pretty crippling state of denial in most cases, if not begging to be made slaves themselves.
** Likewise with the Aiel, which is a society made up entirely of ProudWarriorRaceGuy practicing HonorBeforeReason. It devastates them to learn that their ancestors were originally pacifists who turned away from their beliefs and failed in their mission to help the Aes Sedai in their task of transporting artifacts to safety. Once this is revealed to the general populace, about one in three are taken by "the bleakness": putting down their weapons and just walking off into the desert. Another faction, the Shaido, take up arms against the one who told them this, [[TheChosenOne Rand al'Thor]], in denial.
* In Creator/ScottWesterfeld's ''Literature/{{Succession}}'' series, the Risen Empire (a collection of 80 inhabited planets) is ruled by the Risen Emperor, who invented immortality in the form of a symbiote that attaches to corpses and brings them back to life. Of course, it turns out that [[spoiler:this only works for 500 years or so, instead of true immortality]]. Needless to say, things get ugly.
** Scott Westerfield likes this Trope. The society in ''Literature/{{Uglies}}'' relies on the government performing operations on everyone that cripple their ability to think independently, and it's enforced by SuperSoldiers.
* There's also the Humans in Zhan's ''Literature/TheConquerorsTrilogy'', who are widely feared for having a superweapon capable of irradiating entire fleets. It turned out to be based on a well-spun accident involving a solar flare.
* The Colonial Defense Forces in Creator/JohnScalzi's ''Old Man's War'' has [[spoiler:vat-grown supersoldiers where the basic DNA used as a template comes from volunteers who die before they can have their consciousness transferred to one of the normal engineered bodies, which they use as special ops forces.]]
* Borogravia in ''Discworld/MonstrousRegiment''. Turns out [[spoiler: the Duchess who supposedly runs the country has been dead for years, their patron deity Nuggan has dwindled to nothing due to [[GodsNeedPrayerBadly lack of belief]], and approximately a third of the top military leaders, if not the entire army, is composed of [[SweetPollyOliver women disguised as men]].]]
* UsefulNotes/NaziGermany in the book ''Literature/{{Fatherland}}''. Unlike the film, the book leaves it ''very'' ambiguous whether the Dark Secret actually gets revealed.
* The Human Empire from Yulia Latynina's ''{{Inhuman}}'' is bloated and evil; a great deal of this is explicit, but corruption often turns out to run even deeper than initially thought. Better yet, a veteran of its foundation eventually explained to his great grand-son, one of the protagonists, that it used to be less corrupt and more monstrously evil back then, [[NecessarilyEvil because that really was the only way to save humanity]] from the intelligent, rapidly-breeding, rapidly-growing, omnivorous Ttakas. That biological weapons were used is public knowledge; that [[spoiler:the TheVirus behind the rampant [[RecycledInSpace Assassins in Space]]-like [[MurderInc terrorist]] [[PathOfInspiration organisation]] was originally created in the First Emperor's labs ran by the aforementioned veterans in order to brainwash human [[SuperSoldier super soldiers]] into fighting with the reckless abandon required, along with some lesser things,]] is not quite as well known.
* This is very nearly the entire story of Creator/UrsulaKLeGuin's tale ''Literature/TheOnesWhoWalkAwayFromOmelas''. Basically, it goes like this: She starts out describing a utopia. Then she decides that the readers won't believe in it, and starts trying to add things to change that... but none of them work until she settles on all the happiness and inspiration in the society relying on [[PoweredByAForsakenChild one horribly abused child]]. Right around then is when it solidifies into a little crystal of horror.
* Pretty much the entire point of the ''Literature/GreenSkyTrilogy'' by Zilpha Keatley Snyder, where the secret is that [[spoiler: children were not taught about Earth's historical capacity for violence, the knowledge being kept by a select few, and anyone who disagreed with this policy got trapped below ground.]]
* In ''Literature/TheObsidianTrilogy'', Armethalieh's mages get their magic from farming it from talismans they force the population to wear and exchange on a monthly basis, from humans who can't practice magic but still have a little of it within them. They also insist on having a society without change in order to prevent demon invasion, which they also don't mention.
** It's been noted in-universe neither of these secrets seems actually ''worth keeping''; their citizenry wouldn't mind what's happening, it would reassure their neighbors and their system's breaking down entirely because nobody knows why they're really doing things and thus mismanage the few necessary changes. At the same time, Armethalieh is very openly doing some nasty things which have given it a dark and ugly reputation - and worse, by people who can be trusted to do these for the wrong reasons so ''not even they'' need be let in on it. The whole thing's a study in societal erosion, [[spoiler: not at all natural]].
* In Holly Lisle's ''Matrin'' novels, the Hars Ticlarim's source of magic is the slaves they keep below ground.
* In the ''Myst'' novels, the Terahnee appear to have a utopian world where automation and mechanical power means no one has to work. In reality, [[spoiler: they're enslaving entire universes' worth of people to provide this "automation".]]
* All of Literature/{{Safehold}} was founded with the dark secret that the religion that underpins every country on the planet is a PathOfInspiration founded out of a combination of [[LuddWasRight technophobia]] and [[AGodIAm megalomania]] on behalf of its central figures. Several figures have been kept out of the loop because if they found out the truth it would shatter their entire world view.

[[folder:Live Action TV]]
* In the ''Series/DoctorWho'' episode "The Beast Below", England, Wales and Northern Ireland (Scotland as mentioned in the episode built their own ship) are being carried through space [[spoiler:on a star whale which they torture to control the speed]] - they know they can't justify their actions, but they're afraid [[spoiler:that freeing the whale will destroy the ship. Thank goodness for Amy Pond, really.]] There's also the fact that [[spoiler:they feed anyone who finds out the truth and disagrees with it to the whale]]. Or simply someone who doesn't do his homework. Luckily, [[spoiler:the whale won't eat children]].
** In the "Long Game", The Ninth Doctor takes Rose and Adam to a news space station called Satellite 5, in the year 200,000 - the era of the Fourth Great and Bountiful Human Empire. However, the Doctor notes that progress is relatively slow, or simply ground to a halt with most of humanity being docile. Then he discovers why - The Fourth Great and Bountiful Human Empire is not a ''human'' empire at all, or at least not human-led, and humanity is secretly being controlled by a monstrous alien known as the Jagrafess by controlling information. The Doctor and Rose would appear a century later with Jack Harkness to learn of the Jagrafess' [[TheManBehindTheMan own masters]]: The Daleks.
* Combining this with PathOfInspiration, the League of 20,000 Planets in ''Series/{{Lexx}}'' was a theocracy headed by the Divine Order that supposedly brought order to the Light Universe and protected it from the chaos of the Dark Zone. His Divine Shadow ruled the League for thousands of years, and successfully indoctrinated humanity to fanatically worship him over generations. The dark secret of the League was that [[spoiler:His Shadow was actually the essence of the last survivor of the Insect Civilization, a race of giant insects that fought and "lost" a genocidal war against humanity.]] The League's true purpose was to [[spoiler:make humanity wholely enslaved to the Insect's desires, to the point that the entire population of the League of 20,000 willingly fed themselves to the Insect at the end of the first season.]] His Shadow reveals all of this to the crew of the Lexx, gloating over the way he used humans to defeat themselves.

* Hades in the folk opera Theatre/{{Hadestown}} tells his Underworld subjects that he's keeping them safe from an enemy that doesn't actually exist.

[[folder:Tabletop Games]]
* The Imperium in ''TabletopGame/{{Warhammer 40000}}'' has gobs and gobs of this. Most of it self-delusional as well.
** The [[PhysicalGod man]] they revere as their Emperor is a semi-conscious anti-theist hooked up to a life support machine [[PoweredByAForsakenChild which runs on the power of the thousands of psyker souls it eats daily]], for a start. Even better: the religious canon that establishes him as GodEmperor? It was written by one of the Primarchs who fell to Chaos. Specifically Lorgar, who fell to Chaos because while the Emperor didn't want anyone worshipping him, there were other deities in the Warp who would very much welcome believers...
** The ruling caste of the Tau Empire use mind control to inspire absolute loyalty in their subjects and hold their empire together. It's also very heavily implied that a piece of technology they gave to a vassal-species to enable direct mind-to-mind communication enabled them to extend said mind control over said species. Said ruling caste were also genetically engineered by the Eldar using the pheremone glands of a Q'orl Hive Queen and inserted into Tau society for their own ends.
** The [[MachineWorship Adeptus Mechanicus]] who keep all of the technology running worship a being known as the Omnissiah. In the overwhelming majority of cases this is another aspect of the Emperor, but around 1% worship the most powerful of the star-eating abominations known as the C'tan, the Void Dragon, which is currently [[SealedEvilInACan asleep under the surface of Mars]]. And to make matters worse still, it is the 1% who are actually correct.
*** The aforementioned C'Tan was placed there by the Emperor, who intentionally wanted to inspire the people on Mars to be creative technologically (at least that's what he aimed for, when he first used Farseeing to see into the future).
* Most of the domains of TabletopGame/{{Ravenloft}} are this trope. In some cases, their political rulers are actually darklords; in others, a PathOfInspiration has taken hold of the populace; in yet others, their societies are completely infiltrated by shapechangers, mind-controllers, sociopathic mad scientists/wizards, undead, or other malign forces. Or all of the above.
** The fact that the ''entire game-setting'' is a construct built by the Dark Powers, via dubious methods and for unknown purposes, also qualifies. The Powers aren't the mightiest forces in the settings of Dungeons and Dragons, but they are close; they still take great pains to not reveal who they actually are.
* Our whole world in ''TabletopGame/{{KULT}}''. Only our prison wardens know about it, and hunt those humans who know, or are coming close to it.
* ''TabletopGame/SLAIndustries'' has a ''Universe'' With a Dark Secret. Anyone who finds out The Truth either gets hunted down and killed, or ceases to exist on their own. The Truth is that [[spoiler: the universe arose from the imagination of a psychic from our world, and they died before it was finished. A lot of the weirdnesses of the SLA universe come from attempts to 'patch over' the gaps.]] The was only revealed in the game's writers' bible, not in any of the sourcebooks (so far).

[[folder:Video Games]]
* Solaris in ''VideoGame/{{Xenogears}}''. Of course, we know they're kind of evil from the outset, but the reasons of their existence and the sheer scale of their crimes are pretty incredible and known only by very, very few, and most citizens in particular are blissfully ignorant.
* ''VideoGame/FinalFantasyVII's'' Shin-Ra corporation holds an arguably exclusive secret; the Mako they use to make everyone's lives better is actually an extract of the life force of the planet. While the general idea is an open secret and most people go about their busy lives knowing they're literally draining the spirit of their planet for batteries, the company goes to great lengths to hide the REAL costs behind mining and refining the stuff - including the fact that the hordes of monsters that live everywhere and in everything are in fact the byproducts / experiments of Mako, and that an alien parasite swarm-lady who found this Mako-rich planet and nearly wiped civilization out to claim it has been ''injected into every supersoldier Shin-Ra has''.
* In ''VideoGame/ChronoTrigger'', the highly magical floating continent of Zeal has a dark secret --- while they used to draw limited power from the renewable Sunstone, the new (nearly unlimited power source) for all of its magic comes from [[spoiler:Lavos]]
* In ''VideoGame/GrandiaII'', Roan finds out that his people are [[spoiler:the game's equivalent of Satan-worshipers,]] and decides they [[spoiler:might as well be the best damned Satan-worshipers they can be, despite their end goal of killing him]].
* In ''VideoGame/MegaManZero'', unknown to the human residents of [[TheEmpire Neo Arcadia]], their utopia comes at a price: the '''[[DeadlyEuphemism retirement]]''' of their fellow (innocent) [[RidiculouslyHumanRobots Reploid]] citizens, courtesy of their supposedly [[DarkMessiah messianic]] leader, [[spoiler:Copy-]]X.
* The ''Videogame/JadeEmpire''. Rain only falls because [[spoiler: the Emperor and his family mortally wounded but did not kill the Water Dragon. As she is a goddess, if she is not killed she will simply live on, never reincarnating]]. Oh, and Emperor Sun Hai [[spoiler: should have died a long time ago but is using the power of the Water Dragon to keep himself alive.]] Oh, and [[spoiler: this was all caused by the emperor's brother, Sun Li, who's basically planning to bring about a perfect totalitarian state]].
* In ''Franchise/MassEffect'', unbeknownst to everyone, the [[BenevolentPrecursors Protheans]] did not build the Citadel or the Mass Relays before their mysterious disappearance 50,000 years ago. [[spoiler: Both are in fact ''millions'' of years old and were originally constructed by the Reapers, as a means to direct all life in the Galaxy along the technological lines they desired, before they returned to cull all advanced civilisations every 50,000 years.]]
** In ''Videogame/MassEffect3'', it is revealed that the asari didn't become galactic top dog by being wisest and smartest and being gifted with natural mind powers. [[spoiler:Their abilities were actually ''engineered'' by the [[AncientAstronauts Protheans]] - and were even given a complete archive of Prothean technology - so as to lead galactic civilization in the war against the Reapers. Instead, they appointed themselves rulers of galactic civilization, to the point of declaring withholding Prothean technology the worst crime on record.]]
* The UPEO in [[{{Macekre}} the Japanese original]] ''VideoGame/AceCombat3Electrosphere'', secretly controlled by the two big corporations. Although, UPEO is more of a "UN-mandated global military with a dark secret" than any sort of empire.
* ''VideoGame/StarcraftII'' the Terran Dominion, Mengsk dark secret on sending the Zerg to attack Tarsonis, and his willingness to eliminate anyone who gets in his way. Also the Dominion (or at least some faction within it) has been secretly been creating a Zerg hybrid.
* ''VideoGame/EscapeVelocity Nova'': The rest of known space already knows one of the Federation's dark secrets, but since the rest of known space consists of a) a icy planet only inhabited because there's profit in the fur of one of the native species, b) an Empire of warrior houses the Federation is already at war with, c) an isolationist [[HigherTechSpecies Higher-Tech Civilization]] already unfairly biased against the Earth-based Federation, d) a Rebellion triggered by some Federation citizens finding out the ''other'' dark secret (and then not being able to convince the public of it), that's doesn't really make things worse. It would probably be bad for Federation morale and internal stability if it came out that the [[TelepathicSpacemen Vell-os]] actually still are enslaved rather than voluntarily serving the Federation, though. The other dark secret the Federation has is that [[spoiler: the [[StateSec Bureau]] have effectively usurped control, destroying the Federation's claim to be TheFederation.]]
* The Sith Empire in ''VideoGame/StarWarsTheOldRepublic'' hides an even darker secret than in the original movies, even though the vast majority of its citizens sees it as a more organized and less blatantly corrupt version of the Republic. Sure, there is rampant social Darwinism mired in outright racism, and they are ruled by a clique of insane Force-users who constantly murder each other and innocent bystanders for power and profit, but at least the social ladder makes sure [[EqualOpportunityEvil the capable get all the way to the top]], and the Emperor, while not benevolent, has a good enough grip on the other Sith and is far enough from the common folk for them to respect him in earnest. [[spoiler:Well, in fact, the Sith Emperor doesn't give a flying crap about the Empire he founded, the Sith he nominally rules, and the rest of the petty state matters. The whole Empire thing got started to create enough docile population for him to kickstart a Dark Side of the Force ritual that would ultimately consume ''all'' life in the Galaxy Far, Far Away and elevate him to [[PhysicalGod immortality and omnipotence]]. The only reason why he hasn't succeeded yet was the efforts of the two VideoGame/KnightsOfTheOldRepublic, Revan and the Exile, and now it's mainly up to the Hero of Tython (the Jedi Knight class character in ''SWTOR'') to stop him for good, while the Empire remains by and large blissfully unaware of all this. It gets worse in the latest expansion Knights of the Fallen Empire. Not only does he not care for the Sith Empire at all, not only was he just using it as fuel for his ritual, but he was also secretly building ''another'' Empire, the Zakuul Eternal Empire, at the same time, on the other side of the galaxy. This is the reason why the Emperor had a tendency to remain silent for centuries at a time: his attention was focused on Zakuul via his avatar there, Emperor Valkorion.]]

* Veracia, largest and (at least until recently) most powerful nation in the world of ''Webcomic/ErrantStory'', is pretty much founded on this trope.

[[folder:Web Original]]
* Some of the most famous [[Franchise/TheSlenderManMythos Slender Man stories,]] beginning with ''Blog/SeekingTruth,'' have stated or at least implied that the United States government is well aware of the Slender Man, and [[TheMenInBlack that there is an entire branch of agents dedicated essentially to being damage control and keeping anyone from revealing his existence,]] [[KilledToUpholdTheMasquerade simultaneously killing,]] [[{{Unperson}} unpersoning]] [[KilledToUpholdTheMasquerade or simply screwing over anyone attempting to reveal him...]] [[GoneHorriblyRight or, ultimately, destroy him.]]

[[folder:Real Life]]
* Until the 60s and 70s, UsefulNotes/CharlesDeGaulle promoted what historians now call "the myth of the Resistance" i.e. that "France had liberated itself" and the Resistance was a widely popular event. While it did exist almost from the beginning of France's surrender, LaResistance was always a minority. Most of the French people accepted occupation out of indifference, stunned by defeat and apathy. The segment of the population who were LesCollaborateurs, were in fact numerically superior to LaResistance. The most famous example is Milice, pro-Nazi paramilitaries and the French police who participated in UsefulNotes/TheHolocaust. This "myth" cracked in the 60s and 70s, and played a role in the May '68 Protests.
* War crimes committed by Japan during the UsefulNotes/SecondWorldWar are still taboo in today's Japan. A few official references still exist to it being a fight against Western imperialism. The people they conquered are not happy with that portrayal.
* This is true about nearly ''any'' and every country with a history of imperialism that wants to promote national pride in the present day. Some argue that this is especially bad in and/or hypocritical in the case of imperialism done by putatively democratic nations. Conquerers and Kings [[AtLeastIAdmitIt make no bones about them taking over other nations]]. The idea of "benign" empire, i.e. conquest disguised as civilizing missions was developed by Parliamentary Britain and Republican France to justify why, despite supporting principles of sovereignty at home, they chose to deny it to people in colonies abroad. The same applies to the USSR's empire, which occupied Poland and much of Eastern Europe.
** The corruption and violence of the French colonial empire was a big taboo in French society until its collapse. To some extent that taboo persists today. Many French today still do not know that one of the worst famines in history happened in Algeria after France conquered it. And likewise their shenanigans in Indochina and Vietnam. Indeed, it's likely that the UsefulNotes/VietnamWar could have been avoided entirely if France committed itself to decolonization after the war. Instead they persisted in holding on to both Vietnam and Algeria only to lose both amid bloody violence, mass repression and terrorism engendered in reaction to French hegemony.
** The United States is absolutely not an Empire, [[ByNoIMeanYes except for that time]] they conquered Mexico (which Ulysses S. Grant himself admitted was little more than land grabbing), or that time they conquered the Philippines in the UsefulNotes/SpanishAmericanWar, or that time they established several client states and [[TheGeneralissimo dictators]] across [[BananaRepublic Latin America]] and [[{{Qurac}} the Middle East]], or that ''long'' period of time during which they systematically displaced and exterminated most of the UsefulNotes/{{Native American|s}} population. (In the case of the Philippines, American doublethink in its colonial policy was so strong and so pervasive, that today ''even the Filipinos themselves'' have taken to denying that America ever had an empire!)
*** For that matter, the very existence of such things as slavery[[note]]which the US was the very last Western country to abolish, unless one counts Brazil[[/note]] and the century and a half of institutional discrimination that followed, could count as this since American primary schools go to great lengths to imply that the US is the greatest country in the world and that it alone is immune to governmental abuse of power, and therefore [[AmericaWinsTheWar the only reason that other democracies even exist]]. Those Americans who find out otherwise tend to be ''[[MyCountryTisOfTheeThatISting pissed]]''.
** The British can't quite get away with saying that they ''[[ImplausibleDeniability weren't]]'' an empire. Instead much ink is spilled in Parliament and conservative press and literature about how the English were more benevolent than the other Empires (an argument taken UpToEleven, of course, by the United States in its own imperial conquests), and how much worse things would have been if they hadn't conquered these nations. A counterfactual presented as a defense, often in the vein of invoking BenevolentAlienInvasion and WhatTheRomansHaveDoneForUs! Never mind such blunders of diplomacy as the Sykes-Picot Agreement, the Irish Troubles, the Arab-Israeli conflict and the Partition of India, all of them consequences of British policies and whose consequences still persist to this day.
* In the [[GloriousMotherRussia Soviet Union]], the existence of the [[http://en.wikipedia.org/wiki/Molotov-Ribbentrop_Pact Molotov-Ribbentrop Pact]] with UsefulNotes/NaziGermany was vigorously denied by the Communist authorities until 1989. Likewise, the 1940 massacre of Polish officers in Katyn was vigorously denied as being a Soviet atrocity, the blame being laid on UsefulNotes/NaziGermany between the massacre's discovery in 1943 and the opening of Soviet records in 1990, following the USSR's collapse.
* The People's Republic of China takes the official stance that it has never done anything bad to its people, though it is alone stating this. Most egregious would be the millions who died in the famines of The Second Five-Year Economic Plan/'Great Leap Forward'[[note]] aka 'The Three Years of Natural Disasters', the deaths being in no way the party's or Mao's fault even though (leaving aside whether he knew of it or not) as the country's leader he was ultimately reponsible. [[/note]], followed by the popular delusion and murderous mob-violence of The Cultural Revolution[[note]] which supposedly had no populist dimension and is instead blamed on a handful of senior leaders acting to undermine Mao, even though it was all his idea and the term 'revolution' should probably be a tip-off as to his intention to get ordinary people involved in denoucing and beating up/to death their ideologically-unorthodox neighbours and/or family members[[/note]], and lastly the 1989 Tiananmen Square Massacre that the US-of-Americans are so fond of mentioning at every opportunity[[note]] which was either an isolated riot by criminals and/or foreign-backed extremists, or simply never happened... though the demonstrations really were mostly about working conditions, wages, etcetc rather than demanding an end to the Chinese Communist Party or wanting elections or anything weird and foreigner-loving like that. [[/note]]. All this censorship does a lot to explain the respect many people have for UsefulNotes/MaoZedong despite the ''immense'' suffering he inflicted upon China's peoples, for one thing, and why there still ''is'' a Chinese Communist Party for another. There's no talk of ''ever'' publicly acknowledging this stuff, because nobody knows how the Chinese will take it and the people responsible (and their children and grandchildren, who form today's Party Leadership) have no pressing desire to find out.
* The Shooting actions and death camps of UsefulNotes/TheHolocaust were an open secret in wartime Germany, since everyone knew someone (who knew someone [who knew someone]) who was involved in the process and people in general are both curious and gossipy. Interestingly most German military personnel, policemen, civil servants, and civilians later claimed that TheHolocaust had occurred in such remote places and under conditions of such secrecy that they only learned about it after the war. This was untrue, [[BelievingTheirOwnLies but many of the people who claimed this probably thought they were telling the truth. Human memory is subject to change over time as we subconsciously change our memories to fit and justify our view of ourselves and others. An important and well-documented part of this process is forgetting things which contradict our views and remembering things which vindicate them.]] Subverting and denying this trope were the main reasons that General Eisenhower made sure that as many German civilians as possible, as well as US troops in the area, visited several Work Camps (where workers who became unfit between January and May '45 who would previously have been euthanized at the recently-liberated Extermination Camps in Poland were left to die of malnutrition) before burial operations had occurred. Eisenhower wanted there to be an overwhelming number of non-Communist eyewitnesses to the atrocities so that no-one could ever reasonably say "it never happened."
** Germany's colonial history is not much of a topic in discussion one way or the other (neither with nostalgia towards the supposed GloryDays nor discussing German crimes) in part because it only lasted roughly 30 years, in part because apart from UsefulNotes/Namibia next to no traces of German colonialism exist and in part because it kinda pales by comparison. That said, during the UsefulNotes/WeimarRepublic there were both those who said Germany was a more benevolent colonial overlord than others and reports from outside Germany (denounced by the political right as propaganda) that said quite the opposite. The one aspect of German colonialism that ''is'' anything close to controversial is the [[https://en.wikipedia.org/wiki/Herero_and_Namaqua_genocide genocide]] perpetrated by colonial authorities under Lothar von Trotha against the Herero and Namaqua in what is now Namibia. While both the descendants of von Trotha and the German government have apologized, it took them awfully long and the descendants of the victims still haven't gotten any sort of restitution of stolen property or reparation for those murdered. That said, German speaking Namibians tend to be more apologetic towards the colonial era, pointing out that they were discriminated against after Germany lost control of the territory in 1915 and South Africa took over (later on they were regarded as "fellow whites" by the Apartheid authorities, however).
* As with the former examples, in present-day Turkey it is currently illegal to affirm that the Ottoman government was involved in the Armenian genocide, and one risks going to jail for doing so.
** Mainly because the Turkish government and apologists have gone to great lengths to deny there ever was an Armenian genocide.