Is act-consequentialism self-effacing?

Act-consequentialism (C) is self-effacing for an agent iff that agent’s not accepting C would produce the best outcome. The question of whether C is self-effacing is important for evaluating C. Some hold that if C is self-effacing that would be a mark against it (Williams 1973: 134); however, the claim that C is self-effacing is also used to defend C against certain objections (Parfit 1984: Ch. 1, Railton 1984). In this paper I will show that one argument suggested by Parfit and Railton fails to establish that C is self-effacing for individuals. However, a slightly different argument may show that C is self-effacing for groups. This raises the intriguing possibility that it might be right for an individual, but not for a group of which they are a member, to accept a moral theory. This possibility, odd though it seems, might be helpful to consequentialists.