American philosopher who developed the Darwinian dilemma — evolutionary debunking of moral realism — and defends a constructivist metaethics.
A Darwinian Dilemma for Realist Theories of Value (2006): natural selection shaped our evaluative attitudes for fitness, not for tracking mind-independent moral facts — either our moral beliefs are mostly wrong (tracking fitness not moral truth) or moral facts are explained by evolution (making moral realism collapse into naturalism). Humean constructivism: moral facts are constituted by the attitudes of ideally coherent agents.
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