 Primitivists typically are non-naturalists who hold that normative properties belong to a metaphysically different kind than natural properties. There is, however, room for a primitivism that is naturalist. There might be natural properties the intrinsic nature of which is not open to analysis or to constitutive explanation, so we should perhaps be open to the idea that the normative properties are among the primitive natural ones. Perhaps, too, the second-order property of being normative is a natural one, where there is no correct constitutive explanation of its nature. There are also primitivist anti-realist theories, such as Parfit’s cognitivist anti-realism and constructivist theories that deploy unanalyzed conceptions of rationality.