 In working toward greater reflective equilibrium, any type of belief can in principle be relevant to one’s conclusions about how political institutions should be arranged. Metaphysical beliefs about free will or personal identity might be relevant, as could epistemological beliefs about how we come to know what moral facts there are. However, while this is correct in principle, Rawls holds that in practice productive moral and political theorizing will proceed to a large extent independent of metaphysics and epistemology. Indeed, as a methodological presumption Rawls reverses the traditional order of priority. Progress in metaethics will derive from progress in substantive moral and political theorizing, instead of (as often assumed) vice versa (CP, 286–302).