The aim of this book is to foster a more explicit and direct discussion of the concept of sacrifice and its importance in moral philosophy. Acts of self-sacrifice have a special place in our moral lives. We admire and celebrate those who give up their lives so that others may live. Despite this important role that sacrifice plays in our moral thinking, moral philosophers have had surprisingly little to say about the nature of sacrifice. This lack of attention to the nature of sacrifice is particularly important given that sacrifice also has an important role to play in several key debates in moral philosophy. The chapters in this volume make an important contribution to our understanding of sacrifice in three areas. The first part of the book investigates the nature of sacrifice. The next group of chapters investigates the role of sacrifice in moral philosophy. Three of these pieces investigate the role of sacrifice in our moral lives generally, while two investigate the role of sacrifice in relation to particular moral theories. The final two chapters investigate the value of sacrifice in relation to political and theological issues. The chapters in this book were originally published as a special issue of the International Journal of Philosophical Studies.