On What Matters is a major work in moral philosophy It is the long-awaited follow-up to Derek Parfit's 1984 book Reasons & Persons one of the landmarks of twentieth-century philosophy In this first volume Parfit presents a powerful new treatment of reasons & rationality & a critical examination of three systematic moral theories
- Kant's ethics contractualism & consequentialism
- leading to his own ground-breaking synthetic conclusion Along the way he discusses a wide range of moral issues such as the significance of consent treating people as a means rather than an end & free will & responsibility On What Matters is already the most-discussed work in moral philosophy its publication is likely to establish it as a modern classic which everyone working on moral philosophy will have to read & which many others will turn to for stimulation & illumination