The line comes from The Dark Knight (2008), spoken by Heath Ledger's Joker during his speech about chaos and order in Gotham. In the film he argues that introducing a little anarchy upsets the established order and reveals how fragile civilisation really is. The quote spread beyond the movie through fan edits, reaction videos and short-form clips, where the Joker's calm menace became shorthand for deliberate disruption. It remains popular because the character is instantly recognisable and the idea fits almost any moment when plans fall apart.