Louis Hartz is best known for his classic study, The Liberal Tradition in America. At Harvard University, his lecture course on nineteenth-century politics and ideologies was memorable. Through the editorial hand of Paul Roazen, we can now share the experience of Hartz's considerable contributions to the theory of politics. At the root of Hartz's work is the belief that revolution is not produced by misery, but by pressure of a new system on an old...