What is it to be the same person over time? The 17th-century British philosopher John Locke approached this question from a forensic standpoint: persons are identified over time with an appropriately related series of psychological states, in particular a chain of memories, and our interest in identifying persons in this way stems from our interest in holding people responsible for their actions. Locke’s psychological account of persons remains highly influential today, although his forensic approach is more contentious. In Staying Alive: Personal Identity, Practical Concerns, and the Unity of a Life (Oxford University Press 2014), Marya Schechtman builds on the Lockean idea of persons as forensic units, expanding it to include a much wider range of practical concerns and recognizing the role of sociological and biological factors in these relationships. Schechtman, a professor of philosophy at the University of Illinois at Chicago, articulates her view in relation to a range of prominent competing positions, in particular Eric Olson’s influential animalist account in which human persons just are human bodies.

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