During a career spanning over thirty years Philip Pettit has made seminal contributions in moral philosophy, political philosophy, philosophy of the social sciences, philosophy of mind and action, and metaphysics. The corpus of work Pettit has contributed and stimulated is all the more remarkable because of the way in which Pettit and his circle adapt lessons learned when thinking about problems in one area of philosophy to problems in a completely different area. Common Minds presents specially written papers by some of the most eminent philosophers alive today, grappling with some of the