The Decline of the Left in the 20th Century Toward a Theory of Historical Regression THE DATE PROPOSED for me to discuss, 1933, immediately summons up two names: Roosevelt and Hitler—Reformism or Barbarism. I wish, though, to couple them with another pair, and another date. The date is 1940. The names are Trotsky and Benjamin. These four names are meant both as contrasts and parallels. At first glance, Hitler and Roosevelt, the New Deal and fascism, might seem polar opposites. But many contemporaries understood Roosevelt and fascism as addressing comparable problems, albeit by somewhat different methods. Similarly, while Benjamin the melancholic mandarin and Trotsky the fiery revolutionary might seem at opposite poles of Marxist discourse, it is the thesis of Platypus that they are both responses to the same crisis of Marxism, just as Hitler and Roosevelt are responses to the crisis of capitalism. These two crises, the crisis of capitalism and the crisis of Marxism, have determined the history of the 20th century, and continue to weigh on the history of the 21st.