Expressivism, Subjectivism and Moral Disagreement

One worry about metaethical expressivism is that it reduces to some form of subjectivism. This worry is enforced by subjectivists who argue that subjectivism can explain certain phenomena thought to support expressivism equally well. Recently, authors have started to suggest that subjectivism can take away what has often been seen as expressivism's biggest explanatory advantage, namely expressivism's ability to explain the possibility of moral disagreement. In this paper, I will give a response to an argument recently given by Frank Jackson to this conclusion that will show that it is false that subjectivism could explain disagreement as well as expressivism.