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 in March, and surrendered his re-entry permit in April. The next year, his wife renounced her US citizenship and became a British citizen. Chaplin severed the last of his professional ties with the United States in 1955, when he sold the remainder of his stock in United Artists, which had been in financial difficulty since the early 1940s. Chaplin remained a controversial figure throughout the 1950s, especially after he was awarded the International Peace Prize by the communist-led World Peace Council, and after his meetings with Zhou Enlai and Nikita Khrushchev. He began developing his first European film, "A King