2. The Complicated Story Of His Creation
The story behind The Joker's creation isn't entirely clear, with artist Jerry Robinson claiming to have created the character after taking inspiration from a "Joker" playing card he found in his Bronx apartment. Batman creator Bob Kane meanwhile insisted that he and Bill Finger were inspired by Conrad Veidt, the star of 1928 film, The Man Who Laughs.
As a result of these conflicting stories, it's tough to say who should be solely credited with bringing the now iconic villain to life in the 40s. Kane has at least acknowledged that playing card, but dismissed it as simply being used as a reference for a similar card to be featured in and on the covers of various Batman comic books. It seems like the truth probably lies somewhere in the middle, but all of their work undoubtedly played a massive role in shaping what The Joker has since become.