Gregory Kavka (1947-1994) was a prominent and influential figure in contemporary moral and political philosophy. The new essays in this volume are concerned with fundamental issues of rational commitment and social justice to which Kavka devoted his work as a philosopher. The topics include the relationship between intention and moral action as part of which Kavka's famous "toxin puzzle" is a focus of discussion, the nature of deterrence, the rationality of morals, contractarian ethics, and the contemporary relevance of Hobbes' political thought. This volume will interest not only philosophers but also political scientists and economists.