In metaethics, moral anti-realism is the doctrine that there are no objective moral values or normative facts. It is usually contrasted with moral realism, which holds that there are objective moral values and any moral claim is therefore either true or false.

In this sequence, I explore these doctrines in depth and ultimately build a case for moral anti-realism.

In my view, the perhaps strongest argument for moral anti-realism is that moral reasoning can be satisfying even once we give up on the realist perspective. Therefore, after the arguments against moral realism, I delve into the mechanics of reasoning about morality from an anti-realist perspective.