Joker is Batman’s greatest foe who’s been responsible for numerous tragedies in his life, including the paralysis of Barbara Gordon and the murder of Jason Todd. Sadistic as he is, Joker has a human side; before his accident, nobody thought he was special and all he wanted was to prove his worth. Emotionally scarred by life’s tragedies, he merely desires to extend his sense of humor to the point where people finally see who he’s meant to be: a star. However, with Batman foiling his crimes, he feels he may never get that chance, so he constantly tries to prove himself so maybe Batman will let him be. A definitive history of Joker has never been established and his real identity has never been confirmed. According to Joker, the three most common origin stories are that he was a failed comedian who could never make an audience laugh, a mob killer named Jack Napier, and the villain known as Red Hood.
The Man Who Laughs, by Jean-François Brazeau.