 An assumption suggested by the very existence of this encyclopedia entry is that there is some unifying set of features in virtue of which all moral systems count as moral systems. But Sinnott-Armstrong (2016) directly argues against an analogous hypothesis in connection with moral judgments, and also seems to take this view to suggest that morality itself is not a unified domain. He points out that moral judgments cannot be unified by any appeal to the notion of harm to others, since there are such things as moral ideals, and there are harmless behaviors that a significant number of people regard as morally wrong: Sinnott-Armstrong gives example such as cannibalism and flag-burning. Whether people who condemn such behaviors morally are correct in those judgments is largely irrelevant to the question of whether they count as moral in the first place.