This Companion makes a new departure in Hobbes scholarship, addressing a philosopher whose impact was as great on Continental European theories of state and legal systems as it was at home. This volume is a systematic attempt to incorporate work from both the Anglophone and Continental traditions, bringing together newly commissioned work by scholars from ten different countries in a topic-by-topic sequence of essays that follows the structure of Leviathan, re-examining the relationship among Hobbes's physics, metaphysics, politics, psychology, and religion.