  These are among the many issues relevant to an investigation into the relation between personal identity and ethics. “Ethics” here is broadly construed to be about the way(s) in which we ought to live our lives, and so it includes both self-regarding and other-regarding practical concerns. Among the self-regarding concerns for which personal identity seems relevant are those about the nature and grounds of survival and immortality, rational anticipation, advance directives, and general prudential concern. Among the other-regarding concerns for which personal identity seems relevant are those about the nature and grounds of moral responsibility, compensation, interpersonal moral relations, abortion and embryonic research, population ethics, and therapeutic treatments for dissociative identity disorders. A leading approach to exploring the relation between identity and ethics, then, is to start with an investigation into the nature of personal identity and see how conclusions in that metaphysical realm might apply to these sorts of practical concerns. After starting with a brief discussion of notable historical accounts taking this approach, we will do so as well, surveying the main theories of personal identity on offer and then seeing what, if anything, they might imply for several self-regarding and other-regarding ethical concerns. We will then turn to discuss several new approaches to discovering the relation between personal identity and ethics, alternatives that have breathed fresh life into the debate.