 In arguing against her emotivist and prescriptivist opponents, Foot develops the outlines of a positive position that should be labeled a version of ethical naturalism in view of the role that it accords facts about human life in defining the content of morality. In “When is a Principle a Moral Principle?” (1954), “Moral Arguments”, and “Moral Beliefs”, Foot makes a case for a distinctive non-utilitarian naturalistic ethics in which the virtues play a central role and in which a trait is justified as a virtue by making a contribution to leading a good human life. Her case for such an ethics is motivated by metaethical concerns, specifically with her dissatisfaction regarding the ability of noncognitivist theories to offer an adequate account of morality.