Reading Parfit: On What Matters is an outstanding overview and assessment of Parfit¿s monumental work by a team of international contributors, and includes replies by Parfit himself. It discusses central features of Parfit¿s book, including the structure and nature of reasons, the ideas underlying moral principles, the relationship between consequentialism, contractualism and Kantian deontology, and many important positions and arguments in current metaethics such as expressivism and moral realism.