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 lash out at his actors and crew. Chaplin exercised complete control over his pictures, to the extent that he would act out the other roles for his cast, expecting them to imitate him exactly. He personally edited all of his films, trawling through the large amounts of footage to create the exact picture he wanted. As a result of his complete independence, he was identified by the film historian Andrew Sarris as one of the first auteur filmmakers. Chaplin did receive help, notably from his long-time cinematographer Roland Totheroh, brother Sydney Chaplin, and various assistant directors such as Harry Crocker