Meta-ethical theories are meant to explain moral psychology, moral reality, and moral reason. Moral psychology considers the actual moral judgments, moral interests, and moral motivation people experience. Moral reality refers to the nature behind true moral statements—what makes our statements true. Moral reason describes our moral knowledge and how we can decide which moral beliefs are best or “most likely true.” Moral realists believe that there are moral facts (moral elements of reality) and they are often optimistic about how well we can understand such facts, but moral anti-realists reject moral realism and don’t think we need moral facts to understand morality. I will briefly discuss five meta-ethical theories, two of which are forms of moral realism and three that are forms of moral anti-realism: Moral naturalism and moral intuitionism are both forms of moral realism; noncognitivism, relativism, and error theory are forms of moral anti-realism. There are many forms of each of these theories, but I will concentrate on one version of each theory. (more…)