A subtrope of the Butterfly of Doom; this trope is sometimes used to "prove" not why You Can't Fight Fate, but why you shouldn't want to.
Whereas the Butterfly of Doom trope shows you everything that goes horribly wrong when you try to Set Right What Once Went Wrong; this trope demonstrates that what was once wrong was actually needed to make the present (or future) better.
Perhaps that the whole [...] [tvtropes.org]