In Les Visiteurs, one of my favorite movies of all time – I once showed it to Dr. Fleming, who said, after an astonished pause, that “this is the most reactionary film I’ve ever seen” – there is a moment when the hero, a medieval knight who has stumbled into the twentieth century, is being shown the Larousse encyclopedia entry on his illustrious family. “Who is this?” he asks about a descendant of his who lived in the eighteenth century. “Oh, he was a famous revolutionary.” And what does that mean, the knight persists. “He wanted to kill the king.”...