In Essays on Derek Parfit's On What Matters, seven leading moral philosophers offer critical evaluations of the central ideas presented in a greatly anticipated new work by world-renowned moral philosopher Derek Parfit. Presents critical assessments of what promises to be one of the key moral philosophy texts of our time Features essays by a team of leading philosophers including Princeton's Michael Smith, one of the world's leading meta-ethicists Addresses Parfit's central thesis - that the main ethical theories can agree on what matters - as well as his defense of moral realism