Coined in the movie "The Dark Knight Rises" by Harvey Dent, A.k.a. Two-Face.
It is the philisophical summary that, no matter what good you intend to do, as long as you live and continue, you will bring about just as much evil as good, if not more through accident or intent. Death becomes a saving grace, providing vindication for their actions and preventing a worsening of certain outcomes through inactivity.
Falling to the same corrupton you sought to eliminate. ( Anakin Skywalker from Star Wars, Lois Griffin from Family Guy)
Prolonged exposure to evil, despite good intentions. (Frodo from Lord of the Rings, Ice King from Adventure Time)
Narrow minded destruction in belief of a greater goal. (Harvey Dent from "The Dark Knight Rises")
You either die a hero, or live long enough to see yourself become the villain.
Polar opposite of flanderization
. When a shallow, bumbling, pathetic, and/or annoying character in a story evolves into a deep, capable (if not extraordinary) hero.
Longbottomed originates from the character Neville Longbottom
(from the Harry Potter
series), who started in book one as a clumsy comic relief who fell off his broomstick, and evolved throughout the series in terms of character development and competence into a vengeful white knight who slew Voldemort's living snake Horcrux
while on fire.