Free will in the many-worlds interpretation of quantum mechanics

Abstract David Wallace has argued that there is no special problem for free will in the many-worlds interpretation of quantum mechanics, beyond the well-known problem of reconciling free will with physical determinism. I argue to the contrary that, on the plausible and popular “deep self” approach to compatibilism, the many-worlds interpretation does face a special problem. It is not clear on the many-worlds picture how our actions can issue from our most central character traits, given that copies of us in other branches are certain to act differently than we do.