This book assembles leading legal, political, and moral philosophers to examine the legacy of the work of Ronald Dworkin. They provide the most comprehensive critical treatment of Dworkin's accomplishments focusing on his work in all branches of philosophy, including his theory of value, political philosophy, philosophy of international law, and legal philosophy. The book's organizing principle and theme reflect Dworkin's self-conception as a builder of a unified theory of value, and the broad outlines of his system can be found throughout the book. The first section addresses the most abstract and general aspect of Dworkin's work--the unity of value thesis. The second section explores Dworkin's contributions to political philosophy, and discusses a number of political concepts including authority, civil disobedience, the legitimacy of states and the international legal system, distributive justice, collective responsibility, and Dworkin's master value of dignity and the associated values of equal concern and respect. The third section addresses various aspects of Dworkin's general theory of law. The fourth and final section comprises accounts of the structure and defining values of discrete areas of law.