You conclude your keen review of Robert Gellately’s Lenin, Stalin, and Hitler: The Age of Social Catastrophe (New York: Knopf, 2007) with a wish that some future scholar would add Mao Zedong to this gem of comparative dictatorship (“Compare and Contrast,” August 11, 2007). At least two other monsters would be missing from your wish list, though: Mussolini and Franco. Their inclusion would offer a more balanced picture of the Twentieth Century, raked as it was by both fascism and communism. In addition, it would put focus on Europe, where it surely belongs when monsters are concerned.