Philippa Foot has for many years been one of the most distinctive and influential thinkers in moral philosophy. Long dissatisfied with the moral theories of her contemporaries, she has gradually evolved a theory of her own that is radically opposed not only to emotivism and prescriptivism but also to the whole subjectivist, anti-naturalist movement deriving from David Hume. Dissatisfied also with both Kantian and utilitarian ethics, she claims to have isolated a special form ofevaluation that predicates goodness and defect only to living things considered as such: she finds this form of evalua