Reasons without persons: Rationality, identity, and time, by Brian Hedden

Brian Hedden's Reasons without Persons is inspired by Derek Parfit's work, which suggested that personal identity is utterly perplexing and that theories that do not drag us into such difficult matters are preferable whenever possible. Hedden defends ‘Time-Slice Rationality’, which holds, roughly, that the requirements of rationality, whether epistemic or practical, do not depend upon the beliefs or preferences the agent had (or will have) at another time. Since we can determine whether an agent is rational simply by examining her attitudes at that time-slice, we don't need to settle any personal identity issues.