In this genre-defying work of cultural history, the chief film critic of Slate places comedy legend and acclaimed filmmaker Buster Keaton's unique creative genius in the context of his time. Born the same year as the film industry in 1895, Buster Keaton began his career as the child star of a family slapstick act reputed to be the most violent in vaudeville. Beginning in his early twenties, he enjoyed a decade-long stretch as the director, star, stuntman, editor, and all-around mastermind of some of the greatest silent comedies ever made, including Sherlock Jr., The General, and The Cameraman. Even through his dark middle years as a severely depressed alcoholic finding work on the margins of show business, Keaton's life had a way of reflecting the changes going on in the world around him. He found success in three different mediums at their creative peak: first vaudeville, then silent film, and finally the experimental early years of...