In his blistering prose, Friedrich Nietzsche (1844-1900) uprooted the traditional study of philosophy as firmly grounded in rationality and truth and lay the foundations for the radicalism of twentieth-century Western thought, as it would emerge after his death. Contemporary thinkers have reinterpreted, revised, and repeated Nietzsche's ideas, but no one has transcended them, and today, no student of philosophy can afford to ignore the life and work of this towering figure. In his definitive work, acclaimed biographer Rüdiger Safranski proves his ability to integrate philosophical analysis with biographical detail and to portray this difficult, often contradictory man with an objective, even-handed grace. Safranski, the author of biographies of Heidegger and Schopenhauer, offers a critical reappraisal of Nietzsche's philosophy by examining the intersection of his life and work, innovatively using biographical details to represent the larger vision of Nietzsche's philosophy.