What does it take to turn an ordinary person into a monster? To create a mass shooter, a terrorist, a Joker?
According to Joker himself, “One bad day.”
That’s how he tells his own story in Batman: The Killing Joke, a 1988 graphic novel by Alan Moore and Brian Bolland. This classic origin story heavily influenced the controversial new Joker film.
Once, Joker was an ordinary man. He was trying to be a good husband-- excerpt, rest at link above --