Defends the idea that moral facts constitute excellent reasons for action, regardless of one's antecedent commitments. Provides some presumptive support for this claim, and then proceeds to criticize the best arguments against moral rationalism (the idea that moral duties entail powerful reasons for action), including a prominent argument by Philippa Foot. Ends by arguing that the idea of intrinsic normativity is not as implausible as many have thought.
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