 I am grateful to the Chicago Early Modern Round Table for helpful feedback on an earlier draft of this entry, Shelley Weinberg and an anonymous referee from SEP for insightful comments on later drafts. I’m also deeply indebted to Margaret Atherton, John Whipple, Marya Schechtman, and the many audiences I’ve gotten feedback from when I was just starting to think about Locke on personhood and personal identity.