At the height of the Algerian war, Jean-Paul Sartre embarked on a fundamental reappraisal of his philosophical and political thought. The result was the Critique of Dialectical Reason, an intellectual masterpiece of the twentieth century, now republished with a major original introduction by Fredric Jameson. In it, Sartre set out the basic categories for the renovated theory of history that he believed was necessary for post-war Marxism.