Identity is considered prima facie the most important philosophical principle in traditional logic and metaphysics. The reflexive ability of the subject implies that he or she can relate to himself or herself and to others, thus establishing the basis for the formation of individual and social identity. The present essays, which contains papers held at the conference of the "Institut International de Philosophie" at the University of Zadar, in 2007, present a range of positions and arguments regarding the possibilities of philosophical interpretation of identity.

As witnessed by recent films such as Fight Club and Identity, our culture is obsessed with multiple personality—a phenomenon raising intriguing questions about personal identity. This study offers both a full-fledged philosophical theory of personal identity and a systematic account of multiple personality. Gunnarsson combines the methods of analytic philosophy with close hermeneutic and phenomenological readings of cases from different fields, focusing on psychiatric and psychological treatises, self-help books, biographies, and fiction. He develops an original account of personal identity (the authorial correlate theory) and offers a provocative interpretation of multiple personality: in brief, "multiples" are right about the metaphysics but wrong about the facts.

Locke on Persons and Personal Identity offers a fresh perspective on Locke's accounts of personal identity within the context of his broader philosophical ideas and the philosophical debates of his day.

Our experience of a unified sense of the self is underwritten by a multiplicity of self-aspects having very different metaphysical commitments. Our experience of unity is provided by a process-which, under certain clinical conditions, is rendered inoperative-that enables a person to experience mental states as personally owned.

The relationship between personal identity and ethics remains on of the most intriguing yet vexing issues in philosophy. It is commonplace to hold that moral responsibility for past actions requires that the responsible agent is in some respect identical to the agent who performed the action. Is this true? On the other hand, can ethics constrain our account of personal identity? Do the practical requirements of moral theory commit us to the view that persons do remain identical over time? For example, does the moral status of abortion or stem cell research depend on whether personal identity is based on psychological or biological properties? Or is it the case that personal identity is not, in fact, relevant to ethics? Personal Identity and Ethics provides the first comprehensive examination of these issues. Topics include personal identity and prudential rationality; personal identity’s significance for moral responsibility and ethical theory; and the practical consequences of accounts of personal identity for issues such as abortion, stem cell research, cloning, advance directives, population ethics, multiple personality disorder, and the definition of death.

John Locke's theory of personal identity underlies all modern discussion of the nature of persons and selves—yet it is widely thought to be wrong. In this book, Galen Strawson argues that in fact it is Locke’s critics who are wrong, and that the famous objections to his theory are invalid. Indeed, far from refuting Locke, they illustrate his fundamental point. Strawson argues that the root error is to take Locke’s use of the word "person" as merely a term for a standard persisting thing, like "human being." In actuality, Locke uses "person" primarily as a forensic or legal term geared specifically to questions about praise and blame, punishment and reward. This point is familiar to some philosophers, but its full consequences have not been worked out, partly because of a further error about what Locke means by the word "conscious." When Locke claims that your personal identity is a matter of the actions that you are conscious of, he means the actions that you experience as your own in some fundamental and immediate manner. Clearly and vigorously argued, this is an important contribution both to the history of philosophy and to the contemporary philosophy of personal identity.