Brian Leiter

Do moral properties figure in the best explanatory account of the world? According to a popular realist argument, if they do, then they earn their ontological rights, for only properties that figure in the best explanation of experience are real properties. Although this realist strategy has been widely influential—not just in metaethics, but also in philosophy of mind and philosophy of science—no one has actually made the case that moral realism requires: namely, that moral facts really will figure in the best explanatory picture of the world. This issue may have been neglected in part because the influential dialectic on moral explanations between philosophers Gilbert Harman and Nicholas Sturgeon has focused debate on whether moral facts figure in relevant explanations. Yet as others have noted, explanatory relevance is irrelevant when it comes to realism: after all, according to the popular realist argument, it is inference to the best explanation of experience that is supposed to confer ontological rights. I propose to ask, then, the relevant question about moral explanations: should we think that moral properties will figure in the best explanatory account of the world?

This is an invited commentary on Richard Rorty's Dewey Lecture, given last year at the University of Chicago Law School. “Pragmatism,” says Rorty, “puts natural science on all fours with politics and art. It is one more source of suggestions about what to do with our lives.” I argue that the truth in pragmatism - that the epistemic norms that help us cope are the ones on which we rely - is obscured by Rorty's promiscuous version of the doctrine, which confuses the criteria for relying on particular epistemic norms (namely, that they work for human purposes) with the content of the norms themselves (most of which make no reference to human purposes, but rather criteria like causal or explanatory power). We need presuppose no Archmiedean standpoint to conclude, as Richard Posner does, that moral inquiry is feeble in a way physics is not; we need only take seriously our best current understanding of the world, how it works, and the epistemic norms that have proven most effective in making sense of it.