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Golden Age

In Batman's first appearance in Detective Comics #27, he is already operating as a crime-fighter. Batman's origin is first presented in Detective Comics #33 (November 1939) and is later expanded upon in Batman #47. As these comics state, Bruce Wayne is born to Dr. Thomas Wayne and his wife Martha, two very wealthy and charitable Gotham City socialites. Bruce is brought up in Wayne Manor, and leads a happy and privileged existence until the age of 8, when his parents are killed by a small-time criminal named Joe Chill while on their way home from a movie theater. That night, Bruce Wayne swears an oath to spend his life fighting crime. He engages in intense intellectual and physical training; however, he realizes that these skills alone would not be enough. "Criminals are a superstitious cowardly lot", Wayne remarks, "so my disguise must be able to strike terror into their hearts. I must be a creature of the night, black, terrible..." As if responding to his desires, a bat suddenly flies through the window, inspiring Bruce to craft the Batman persona.

In early strips, Batman's career as a vigilante earns him the ire of the police. During this period, Bruce Wayne has a fiancé named Julie Madison. In Detective Comics #38, Wayne takes in an orphaned circus acrobat, Dick Grayson, who becomes his vigilante partner, Robin. Batman also becomes a founding member of the Justice Society of America, although he, like Superman, is an honorary member, and thus only participates occasionally. Batman's relationship with the law thaws quickly, and he is made an honorary member of Gotham City's police department. During this time, Alfred Pennyworth arrives at Wayne Manor, and after deducing the Dynamic Duo's secret identities, joins their service as their butler.