Editing Marvel Comics (section)

===Magneto===
Introduced as fairly generic racial supremacist villain in the Silver Age - more or less Mutant Hitler with magnetism powers - Magneto was subsequently salvaged in the Bronze Age, which retconned him into having a much deeper backstory; born a German Jew, he lost his family to the death camps, and when he saw that anti-mutant sentiment was on the rise, he immediately saw the similarities to the anti-Semitism that had exterminated his kinsfolk, and he swore that he would not stand by and allow it to happen again. Add a few more traumas to deepen the misanthropy, stir in a genuine sense of nobility and a true zeal to protecting and promoting mutantkind, and somebody who had been a forgettable, generic villain went on to become one of Marvel's most popular villains, the mutie Malcom X to Professor Xavier's mutie Martin Luther King, and even a shift between "noble villain" and "antihero" over the decades.