Concentrating on the views of Christopher Stone, who advocates moral pluralism, and J. Baird Callicott, who criticizes Stone’s views, I argue that the debate has been confused by a conflation of three different positions, here called minimal, moderate, and extreme moral pluralism. Minimal pluralism is uncontroversial because all known moral theories are minimally pluralistic. Extreme pluralism is defective in the ways that Callicott alleges and, moreover, is inconsistent with integrity in the moral life. However, moderate pluralism of the sort that (...) I advance in Environmental Justice is distinct from extreme pluralism and free of its defects. It is also consistent with Callicott’s version of Aldo Leopold’s land ethic, which is itself moderately pluralistic. (shrink)

Despite Christopher Stone’s recent argument on behalf of moral pluralism, the principal architects of environmental ethics remain committed to moral monism. Moral pluralism fails to specify what to do when two or more of its theories indicate inconsistent practical imperatives. More deeply, ethical theories are embedded in moral philosophies and moral pluralism requires us to shift between mutually inconsistent metaphysics of morals, most of which are no Ionger tenable in light of postmodern science. A univocal moral philosophy-traceable to David Hume’s (...) and Adam Smith’s theory of moral sentiments, grounded in evolutionary biology by Charles Darwin, and latterly extended to the environment by Aldo Leopold-provides a unified, scientifically supported world view and portrait of human nature in whichmultiple, lexically ordered ethics are generated by multiple human, “mixed,” and “biotic” community memberships. (shrink)