Practical Reason and the Status of Moral Obligation

Abstract

The power of skepticism depends on the apparent possibility of rationally asking, for virtually any kind of proposition commonly thought to be known,howit is known or what justifies believing it. Moral claims are among those commonly subjected to skeptical challenges and doubts, even on the part of some people who are not skeptical about ordinary claims regarding the external world. There may be even more skepticism about the possibility of justifying moralactions,particularly if they are against the agent's self-interest. Both problems-how to justify moral claims and how to justify moral action - come within the scope of the troubling question “Why be moral?” Even a brief response to moral skepticism should consider both kinds of targets of justification, cognitive and behavioural, and should indicate some important relations between the two types of skeptical challenge. I will begin with the cognitive case- with skepticism about the scope of theoretical reason in ethics - proceed to practical skepticism, which concerns the scope of practical reason, and then show how an adequate account of rationality may enable us to respond to moral skepticism.