->''"The optimist proclaims that we live in the best of all possible worlds; and the pessimist fears this is true."''
-->-- ''The Silver Stallion'' (1926) by Creator/JamesBranchCabell

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Ever wonder what would happen if something in your favorite series ''[[StatusQuoIsGod changed]]''? Do you wish TheScrappy had never been born, the BigBad would get his comeuppance, or that TheAdjectivalSuperhero and his love interest [[SuperheroesStaySingle would just get married already]]?

[[BeCarefulWhatYouWishFor Well...]]

Look! It's an AlternateUniverse, [[JackassGenie in which all of these "problems" are fixed!]] Let us see what happens:

Oh noes! This other universe is [[CrapsackWorld a terrible place]]! Tropeman's enemies have discovered his secret identity by [[HollywoodHacking hacking]] [[ItsASmallNetAfterAll the internet]], and now they've [[StuffedIntoTheFridge horribly murdered his wife]]. Since the BigBad is in jail, the [[EvilPowerVacuum power-vacuum caused by his absence]] has resulted in [[SortingAlgorithmOfEvil an even worse villain stepping up to the plate]], and now Cthulhu is running for president. Also, TheScrappy was somehow responsible for preventing World War III.

There now. See how terrible change can be? But don't worry, we can fix it: at the last moment, a magical imp shows up and [[ResetButton changes this universe]] [[RubberBandHistory into an almost perfect copy of the original one]]. Now Tropeman and his girlfriend are in an unsatisfying quasi-dating relationship, the BigBad is causing trouble, and TheScrappy is getting plenty of screen time. Everyone's happy!

In other words, the canon is treated like the Best of All Possible Worlds for the characters, and an AlternateUniverse / {{Elseworld}} / WhatIf has two options: have a DownerEnding, or revert to match the original canon. HitlersTimeTravelExemptionAct often runs on this.

See also: BecauseDestinySaysSo (which generally runs on this trope); RubberBandHistory (the general tendency for alternate histories to end up more like the "real" history); ItsAWonderfulPlot (a specific history change that almost always makes things worse); ExpendableAlternateUniverse (when the characters from the main universe would rather just go home than try to fix the alternate one or save anyone in it). Contrast ScrewDestiny.


[[folder:Anime and Manga]]
* Inverted (so far) in ''Anime/RebuildOfEvangelion''. It is by no means a happy place, but (so far) no main characters have died, making it markedly happier than the original ''Anime/NeonGenesisEvangelion''.
** [[spoiler: Played Straight in Rebuild 3.0. Its arguably worse than the original series, what with Shinji having caused 3rd Impact and killing most of humanity, making him the most hated person on Earth. Also Eva pilots are CursedWithAwesome or BlessedWithSuck as the Evas make them immortal so they have to keep piloting and fighting {{Eldritch Abomination}}s forever. And 4th Impact is on the way. In one movie Rebuild went from LighterAndSofter to DarkerAndEdgier]]
* Deconstructed and back in the series ''Anime/{{Noein}}''. Haruka has the ability to jump dimensions, and spends an episode or two observing possible parallel or future time lines. One is 'perfect' in a StepfordSmiler kind of way, one is seriously [[AfterTheEnd post-apocalyptic]], and most are pretty average, but after all of it she comes to decide there really isn't a best world, and even if there was, it's really not where she belongs.

* Pick a DC Elseworld. Any DC Elseworld.
** And throw in the old "Imaginary Tales" for good measure. Superman and Lois Lane get married and have kids? Something goes horribly wrong. And the moral of the story, dear children, is that Superman should stay single forever for the safety of himself and others.
*** Averted in the Imaginary Story "Superman Red and Superman Blue" after accidentally [[StarfishCharacter splitting himself in two]], Superman not only fixes all of his personal problems (now he can marry BOTH Lois Lane and Lana Lang!) he also turns the world into an Utopia (thanks to the SuperIntelligence he also conveniently gained) curing all diseases and turning ALL criminals good.
* This was the heart of the original Creator/MarvelComics ''ComicBook/WhatIf'' series. Only one or two stories ever came out happier than Earth-616's story. (Ironically one of the few that had a happy ending was a version of the original Clone Saga years before ComicBook/TheCloneSaga came to be rued in the minds and hearts of fans.)
** Averted in the Ultimate Wolverine vs. Hulk. There's a scene where Cap and Tony are seen playing table tennis, one of the characters states they had an awful dream in which Civil War took place. Both of them laugh and assure everyone that it would never happen.
** In Matt Fraction's ''ComicBook/TheDefenders'', the entire 616 universe is what it is because of the miraculous intervention of gods, who used strange "Concordance Engines" to ensure that the world would be populated with superheroes (and that futures with bad outcomes, like the What-If universes, never come to be).
** In All-New X-Men, a sojourn into the Ultimate Universe leaves Laura Kinney suffering a FreakOut because, as the status of mutants is objectively worse (i.e. all mutants are the product of Weapon X), every alternate reality they is worse for them (given all the apocalyptic realities for mutants) and theirs is the this trope.
* [=DV8=]'s Freestyle has this as her ''superpower''. She can see what will happen if she takes a certain course of action, choosing the best outcome from dozens of parallel universes and making it a reality. It puts a lot of strain on her; a task with a lot of variables, like bypassing a security door with a combination lock, will cause her to age rapidly, though she will revert back to normal after a while.

[[folder:Live-Action TV]]
* The ''Series/BuffyTheVampireSlayer'' AlternateUniverse where Willow and Xander were vampires and its RocksFallEveryoneDies at the end would qualify. Though given the point of the episode wasn't so much that the world they had was good as that Buffy had done a lot less harm than good over the course of the series, the bar is set low enough to be highly reasonable.
** Anyanka invokes this, or possibly its inverse, in the climax, asking Giles how he knows the original reality was any better. Giles responds, "Because it has to be." ''Smash.''
* The Framework in ''Series/AgentsOfShield'' was originally designed to resolve the biggest regret of every inhabitant. Daisy and Jemma are surprised to find a CrapsackWorld [[spoiler: run by HYDRA]] caused by undoing Melinda's regret over [[spoiler: killing an Inhuman child in Bahrain]].
* In ''Series/DoctorWho'' we have the alternate universe created when Donna [[ForWantOfANail turns right]] in [[Recap/DoctorWhoS30E11TurnLeft "Turn Left"]], which causes the Doctor to die at the Thames Barrier when he defeats the Racnoss, and several contemporary attacks on Earth to cause mass casualties, and/or wipes out several of the Doctor's allies (including Martha, who he never met here). Naturally, Donna set her timeline back on its proper course at the end of the episode.
* Played with in ''Series/{{Fringe}}'' after [[spoiler: Peter is erased from history]]. While many things have changed, the bad things and the good things changed are sprinkled evenly across both universes, and no ResetButton seems forthcoming.

[[folder:Philosophy and Theology]]
* This is one of the answers to the argument of the Problem of Suffering, particularly suffering created by nature: Designing creation any other way would lead to other, more destructive consequences. No one actually supports this as a theological theory anymore due to two serious problems with it. One was soundly mocked by Voltaire in Candide with the character of Pangloss: one could call the universe in which we live the best possible no matter ''how'' hellish it is, because we are naturally incapable of knowing what other universes could be like. The other is that, granting that this ''is'' the best possible world, since it apparently requires so much evil why should God have made it in the first place?
* Inverted in Schopenhauer's philosophy, who was rather pessimistic and tended to the opposite idea.

* The ''WesternAnimation/FamilyGuy'' episode "Stewie Kills Lois" deals with ExactlyWhatItSaysOnTheTin. Stewie finally carries out his long running threat to kill his mother. [[spoiler: Over the course of the episode and the next he takes over the world, culminating in an action movie style showdown between him and his parents (Mom was NotQuiteDead), which results in his death. The we see it was [[AllJustADream all just a simulation]], and Stewie concludes he's not ready to kill Lois yet. Brian lampshades the cheapness of this ending.]]
* Most of ''WesternAnimation/{{Futurama}}'''s "Anthology of Interest" episodes are like this.