Title: Composition as Identity defeats an Ethical Objection to Four-Dimensionalism

Johnston, Olson, and Taylor have argued against four-dimensionalism on the grounds that it commits us to the existence of personites, which are proper temporal parts of four-dimensional persons. They argue that the existence of personites makes many of our moral beliefs and practices untenable, so we must either give up those beliefs and practices or reject four-dimensionalism. I show that composition as identity can solve this problem: composition as identity can make four-dimensionalism and personites consistent with our moral beliefs and practices. Four-dimensionalism is saved and we have a novel reason to endorse composition as identity.