 The terrorism employed by both sides in the Russian Revolution and Civil War was in important respects a throwback to that of the Jacobins. The government set up in Russia by the victorious Bolsheviks was totalitarian. So was the Nazi rule in Germany. Both sought to impose total political control on society. Such a radical aim could only be pursued by a similarly radical method: by terrorism directed by an extremely powerful political police at an atomized and defenseless population. Its success was due largely to its arbitrary character—to the unpredictability of its choice of victims. In both countries, the regime first suppressed all opposition; when it no longer had any opposition to speak of, political police took to persecuting “potential” and “objective opponents”. In the Soviet Union, it was eventually unleashed on victims chosen at random. Totalitarian terrorism is the most extreme and sustained type of state terrorism. As Hannah Arendt put it, “terror is the essence of totalitarian domination”, and the concentration camp is “the true central institution of totalitarian organizational power” (Arendt 1958: 464, 438). While students of totalitarianism talked of terrorism as its method of rule, representatives of totalitarian regimes, sensitive to the pejorative connotation of the word, portrayed the practice as defense of the state from internal enemies.