This book presents a theory of personhood and moral personhood using results from recent work on intentionality in the philosophy of mind. An account of intentional kinds, causation, and explanation is provided to resolve some current issues in moral and legal theory, and to examine questions raised in law and medicine where it is necessary to deal with human individuals at the boundaries of their lives. Topics discussed include abortion, death, euthanasia, personal identity, rights - including the right to privacy and the right to die - servility, and suicide.