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 to have little interest in a Chaplin film without Chaplin, and it was a box office disappointment. The filmmaker was hurt by this failure – he had long wanted to produce a dramatic film and was proud of the result – and soon withdrew "A Woman of Paris" from circulation. Chaplin returned to comedy for his next project. Setting his standards high, he told himself "This next film must be an epic! The Greatest!" Inspired by a photograph of the 1898 Klondike Gold Rush, and later the story of the Donner Party of 1846–47, he made what Geoffrey Macnab calls