DC Comics was a hotbed of experimentation during the 1970s, and in 1975 the character became the first villain to feature as the title character in a comic book series, The Joker. The series followed the character’s interactions with other supervillains, and the first issue was written by O’Neil. Stories balanced between emphasizing the Joker’s criminality and making him a likable protagonist whom readers could support. Although he murdered thugs and civilians, he never fought Batman; this made The Joker a series in which the character’s villainy prevailed over rival villains, instead of a struggle between good and evil. Because the Comics Code Authority mandated punishment for villains, each issue ended with the Joker being apprehended, limiting the scope of each story.
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