In the late 1930s, as a little man named Adolf Hitler prepared the fearsome German army to run roughshod over the country’s European neighbours, Charles Chaplin, one of the greatest of all film artists, responded to the threat of war in the only way that made sense: He prepared a new comedy, The Great Dictator, that mocked Hitler directly. In some ways, it’s hard to imagine Chaplin could have done anything else. Ignoring Hitler was already out of the question. The similarities between Chaplin and the Nazi leader were often remarked upon, including by Chaplin himself. For one thing, they obviously shared the same moustache. (More than coincidence?) They were born within the same four-day period in April 1889. They both grew up in poverty, and there were superficial similarities in their sensibility-Hitler was a frustrated artist and, like Chaplin, a fan of Wagner. Chaplin’s son famously remembered his father saying, “Just think, he’s the madman, I’m the comic. But it could have been the other way around.”