  But if moral naturalism is true, the realist needn’t grant the skeptic’s premise that our moral beliefs are the product of evolutionary facts rather than moral facts. If moral facts are natural, then we needn’t see moral facts as being contrary to natural, evolutionary facts. The moral facts might be among these evolutionary facts that explain our moral beliefs. If, for instance, to be good just is to be conducive to social cooperation, then an evolutionary account that says that we judge things to be good only when they are conducive to social cooperation would not debunk any of our beliefs about goodness. This account would, instead, provide a deep vindication of those beliefs (Copp 2008).