This chapter explores the possibility of naturalizing the normative. It shows how some of the aims of well-conceived naturalization projects can be achieved: normative properties are in some cases accessible to perception and, even apart from that possibility, may be justifiedly ascribed to actions or other elements on the basis of clearly natural properties. One reason for the philosophical attraction of naturalizing normativity is what one might call the epistemological authority of perception. For philosophical naturalists, perception is often taken to have epistemological sovereignty, in the sense that it is essential for any other kind of knowledge and is the ultimate test of claims to knowledge or justified belief. Naturalization projects occur in all major domains of inquiry: for instance, in ethics, epistemology, philosophy of mind, even theology. Any account of ethical objectivity, something ethical naturalists wish to preserve, should provide a major role for perception.