Satire (1922), "Elmer Gantry" (1927; dedicated by Lewis to H. L. Menchen), and "It Can't Happen Here" (1935), and his books often explored and satirized contemporary American values. The film "The Great Dictator" (1940) by Charlie Chaplin is itself a parody of Adolf Hitler; Chaplin later declared that he would have not made the film if he had known about the concentration camps. In the United States 1950s, satire was introduced into American stand-up comedy most prominently by Lenny Bruce and Mort Sahl. As they challenged the taboos and conventional wisdom of the time, were ostracized by the mass media establishment
Charlie Chaplin with Chaplin describing to the composer(s) exactly what he wanted and singing or playing tunes he had improvised on the piano. These tunes were then developed further in a close collaboration among the composer(s) and Chaplin. According to film historian Jeffrey Vance, "although he relied upon associates to arrange varied and complex instrumentation, the musical imperative is his, and not a note in a Chaplin musical score was placed there without his assent." Chaplin's compositions produced three popular songs. "Smile", composed originally for "Modern Times" (1936) and later set to lyrics by John Turner and Geoffrey Parsons, was a hit