Plato's Moral Realism

Plato's moral realism rests on the Idea of the Good, the unhypothetical first principle of all. It is this, as Plato says, that makes just things useful and beneficial. That Plato makes the first principle of all the Idea of the Good sets his approach apart from that of virtually every other philosopher. This fact has been occluded by later Christian Platonists who tried to identify the Good with the God of scripture. But for Plato, theology, though important, is subordinate to metaphysics....