 There are both naturalist and non-naturalist forms of normativity objectualism. Non-naturalism, however, is typically primitivist. It gives a negative answer to our guiding question. As we saw, ethical naturalism can also be primitivist. But if a theory is going to offer a constitutive explanation of normativity, or constitutive accounts of the normative properties and concepts, in each case the explanans proposed by the theory is almost certain to be a natural property or condition. That is, the theory is almost certain to be a kind of reductive normative naturalism. Accordingly, this section discusses theories of this kind.