Mark Timmons

J. L. Mackie argued that if there were objective moral properties or facts, then the supervenience relation linking the nonmoral to the moral would be metaphysically queer. Moral realists reply that objective supervenience relations are ubiquitous according to contemporary versions of metaphysical naturalism and, hence, that there is nothing especially queer about moral supervenience. In this paper we revive Mackie's challenge to moral realism. We argue: (i) that objective supervenience relations of any kind, moral or otherwise, should be explainable rather than sui generis; (ii) that this explanatory burden can be successfully met vis-à-vis the supervenience of the mental upon the physical, and in other related cases; and (iii) that the burden cannot be met for (putative) objective moral supervenience relations.

This paper contains an overview of the essays contained in the Mind and morals anthology plus a critical discussion of certain themes raised in many of these essays concerning the bearing of recent work in cognitive science on the traditional project of moral theory. Specifically, I argue for the following claims: (1) authors like Virginia Held, who appear to be antagonistic toward the methodological naturalism of Owen Flanagan, Andy Clark, Paul Churchland, and others, are really in fundamental agreement with the naturalists (at least once the naturalist view is suitably clarified); (2) the prototype theory of moral concepts that is inspired by recent work in cognitive science does not necessarily jeopardize the aim of systematization characteristic of traditional moral theory; (3) nor does it threaten certain widely accepted views about moral rationality that is part of traditional moral theorizing. Moreover, I speculate that (4) recent work in cognitive science can be expected to play a corroborative role in the justification of theories in ethics, but we should probably not expect this work to yield new insights and directions in ethics. Finally, (5) Fodor's recent critique of cognitive science makes clear the perils of methodological ethical naturalism.