  The issue of what makes for a moral theory is contentious. An ethical egoist could challenge whatever constraint is deployed against her. But a neater reply is to move to rational egoism, which makes claims about what one has reason to do, ignoring the topic of what is morally right. This gets at what ethical egoists intend, while skirting the issue of constraints on moral theories. After all, few if any ethical egoists think of egoism as giving the correct content of morality, while also thinking that what they have most reason to do is determined by some non-egoist consideration. One could then, if one wished, argue for ethical egoism from rational egoism and the plausible claim that the best moral theory must tell me what I have most reason to do.