The essays in this volume, first published in 2005, offer valuable insights into personal identity and its implications for morality and public policy.What is a person? What makes me the same person today that I was yesterday or will be tomorrow? Philosophers have long pondered these questions. These essays--written by prominent philosophers and legal and economic theorists--offer valuable insights into the nature of personal identity and its implications for morality and public policy.What is a person? What makes me the same person today that I was yesterday or will be tomorrow? Philosophers have long pondered these questions. These essays--written by prominent philosophers and legal and economic theorists--offer valuable insights into the nature of personal identity and its implications for morality and public policy.What makes me the same person today that I was yesterday or will be tomorrow? In Plato's Symposium, Socrates observed that all of us are constantly undergoing change--physical as well as changes in our manners, customs, opinions, desires, pleasures, pains, [and] fears. Aristotle theorized that some underlying substratum remains constant even while we undergo these changes. John Locke rejected Aristotle's view and reformulated the problem of personal identity in his own way. These essays--written by prominent philosophers and legal and economic theorists--offer valuable insights into the nature of personal identity and its implications for morality and public policy.Introduction; Acknowledgments; Contributors; 1. Experience, agency, and personal identity Marya Schechtman; 2. When does a person begin? Lynne Rudder Baker; 3. Persons, social agency, and constitution Robert A. Wilson; 4. Hylemorphic dualism David S. Oderberg; 5. Personal identity and self-ownership Edward Feser; 6. Self-conception and personal identity: revisiting Parfit and Lewis with an eye on the grip of the unity reaction Marvin Belzer; 7. The normativity of self-grounded reason Dal£u