Some scepticism about moral realism

Conclusion The lesson is that while externalists avoid devastating objections to internalist moral realism, they thereby sacrifice most of thepractical significance of moral realism as an alternative to noncognitivism. They defend the objectivity of moral beliefs, but are forced to concede that the practical relevance and appeal of those beliefs depends on subjective desires. It is because they correctly reject internalism that they succumb to the non-cognitivists'tu quoque.