Written at the height of the philosopher's intellectual powers, Friedrich Nietzsche's On the Genealogy of Morals has become one of the key texts of recent Western philosophy. Its essayistic style affords a unique opportunity to observe many of Nietzsche's persisting concerns coming together in an illuminating constellation. A profound influence on psychoanalysis, antihistoricism, and poststructuralism and an abiding challenge to ethical theory, Nietzsche's book addresses many of the major philosophical problems and possibilities of modernity. In this unique collection focusing on the Genealogy, twenty-five notable philosophers offer diverse discussions of the book's central themes and concepts. They explore such notions as ressentiment, asceticism, "slave" and "master" moralities, and what Nietzsche calls "genealogy" and its relation to other forms of inquiry in his work. The book presents a cross section of contemporary Nietzsche scholarship and philosophical investigation that is certain to interest philosophers, intellectual and cultural historians, and anyone concerned with one of the master thinkers of the modern age.