Whether morality has rational authority is an open question insofar as we can seriously entertain conceptions of morality and practical reason according to which it need not be contrary to reason to fail to conform to moral requirements. Doubts about the authority of morality are especially likely to arise for those who hold a broadly prudential view of rationality. It is common to think of morality as including various other-regarding duties of cooperation, forbearance, and aid. Most of us also regard moral obligations as authoritative practical considerations. But heeding these obligations appears sometimes to constrain the agent's pursuit of his own interests or aims. If we think of rationality in prudential terms–as what would promote the agent's own interests–we may wonder whether moral conduct is always rationally justifiable. Indeed, we do not need to think of rationality in exclusively prudential terms to raise this worry. The worry can arise even if there are impartial reasons–that is, nonderivative reasons to promote the welfare of others.
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