History SelfFulfillingProphecy / FanWorks

* In ''Fanfic/AThingOfVikings'' King Mac Bethad of Alba feared Berk conquering Alba was inevitable pretty much from the moment he heard about Berk having trained dragons even though historically Berk hadn't been a threat to his kingdom or anyone else for that matter. So what do he do? He ends up setting forth a chain of events that lead to just that. The epigraph in one chapter mentions that Mac Bethad's actions from when Berk started training dragons to his death end up becoming a morality story about how [[ImproperlyParanoid baseless suspicions]] will only result in chaos and death.

* The central premise of ''[[https://archiveofourown.org/works/28237845/chapters/69195987 Change fate by being aggressively kind]]'' is someone trying to avert this. A prophecy is told throughout the land of three children who will eventually grow up to bring about the apocalypse, and so every adventurer in the land seeks to end the prophecy by slaughtering them...except Phil, who realizes that a lifetime of being hunted for things they haven't even done yet will give the children a negative view of humanity and no choice ''but'' to end the world in response. Therefore, he hunts them down to [[HappilyAdopted adopt them]] and give them a better life than that. [[spoiler:He's also motivated to do this because ''he'' nearly gave in to one of these in the past -- a prophecy about how an avian would kill thousands upon thousands, which led to avians being hunted until he was the SoleSurvivor of his species, at which point he hid away rather than give in to his rage and prove the prophecies right.]]

* In ''Fanfic/DaphneGreengrassAndTheBoyWhoLived'', this idea is discussed in concept when Dumbledore talks with Daphne about her visions as she learns about her potential as a Seer. Dumbledore observes that Daphne’s glimpses of the future are so comparatively vague that it's impossible to be sure if acting in a certain way because of the visions will cause them to come to pass or prevent them, so it's best to just do what feels right when the time comes.
* ''Fanfic/PrincessOfTheBlacks'' has an especially ironic example. Dumbledore, who in canon remarked that Voldemort's attempts to circumvent the prophecy caused it to come to fruition, fears a prophecy about one of the Potter twins "knowing only darkness" and possibly being the one to defeat Voldemort; so he sets out to have the appropriate twin permanently removed from the Magical World. Little Jen would spend four years in an abusive home before she was blinded and abandoned; she went on to grow up a child prostitute and become an ''immensely'' powerful Black Witch. Throughout the series, Dumbledore proves incapable of realizing that Jen's darkness is his own fault, instead believing that she was born evil.