Charlie Chaplin’s wild popularity was such that he was able to keep making silent films well into the sound era. When he finally made a true “sound” film, he made it count, taking aim at one of the biggest targets: Adolf Hitler himself. Chaplin plays dual roles: A fascist dictator and a Jewish barber who is persecuted in his society. Made when the United States was still technically neutral in World War II, the film was a searing indictment of fascism and Nazism, and proved one of Chaplin’s most successful films.