Abstract
Various moral theories are essentially welfare-involving in that they appeal to the promotion or the respect of well-being in accounting for the moral rightness of at least some acts. Further, various theories of well-being are essentially morality-involving in that they construe well-being in a way that essentially involves morality in some form or other. It seems that, for any moral theory that is essentially welfare-involving and that relies on a theory of well-being that is essentially morality-involving, a circularity problem may well arise, one where moral rightness will end up being accounted for partly in terms of well-being, which itself is already being accounted for partly in terms of moral rightness. In this paper I will elaborate on this last point. Then I will examine five responses to the circularity problem at issue, and I will argue that one of them appears to be at least slightly better than all of the others.