Abstract

Michael Smith’s The Moral Problem gives an admirably straightforward condition for moral rightness: an act is morally right in circumstance C only if under conditions of full rationality we would all want to perform that act. I will assume that this condition, if met, would make acts objectively right and therefore vindicate a robust form of metaethical realism. There remains the question, however, of whether this condition can be met. Smith considers several arguments that it cannot, and this paper will argue that his response to one of them— Gilbert Harman’s “successful criminal” argument—is inadequate. Clear and straightforward as it is, Smith’s condition for moral rightness is deceptively strong for it requires a full convergence of desires. It appears that moral facts can exist only if there is unanimous agreement about how we would want to behave if we were fully rational. The unanimity requirement leaves Smith vulnerable to sensible knave style objections. If someone can be fully rational yet not desire to perform acts in accordance with morality, then according to Smith’s account, we should be skeptical about the existence of moral facts. Harman presents such an objection in the form of a successful criminal who does not observe the alleged requirement not to harm or injure people outside of his criminal organization. Most importantly, the criminal’s disregard of outsiders is not due to inattention, failure to consider or appreciate certain arguments, ignorance of relevant evidence, errors in reasoning, irrationality, unreasonableness, or weakness of will. If this criminal is truly rational and still desires to steal..