Personal identity is the set of necessary and sufficient conditions that make a person the same over time.

Further reading

Broome, John (1991) Utilitarian metaphysics?, in Jon Elster & John E. Roemer (eds.) Interpersonal Comparisons of Well-Being, Cambridge: Cambridge University Press, pp. 70–95.

Parfit, Derek (1984) Reasons and Persons, Oxford: Clarendon Press, part 3.

Shoemaker, David W. (2005) Personal identity and ethics, Stanford Encyclopedia of Philosophy, December 20 (updated 11 October 2019).

Related entries

moral philosophy | philosophy | philosophy of mind