The essays in this volume address questions about responsibility that arise in moral philosophy and legal theory. Some analyse different theories of causality, asking which theory offers the best account of human agency and the most satisfactory resolution of troubling controversies about free will and determinism. Some essays look at responsibility in the legal realm, seeking to determine how the law should assign liability for negligence, or whether the courts should allow defendants to offer excuses for their wrongdoing or to claim some form of 'diminished responsibility'. Other essays explore libertarian views about political freedom and accountability, asking whether libertarian positions on consent, contract law, and responsibility are consistent, or whether restitution is superior to retribution or deterrence as a basis for a theory of corrective justice. Still others examine the notion of partial or divided responsibility, or the relationship between responsibility and the emotions.