The "problem of evil" in broadest terms is the problem of how to account for the existence of evil within systems of thought that would seem to exclude it -- that may identify reality with goodness in one way or another. Within Christian thought these efforts are generally called "theodicy.' But the problem precedes Christian efforts. Plato, for example, postulated a Form of the Good that is the most real of realities. This means that he starkly identified Good with Real, and THAT raises the question of -- why isn't it? Or not so much. When the neoplatonists came along a couple of centuries later and strove to put Platon's thoughts into more systematic form, tried to make linear treatises out of hints from not especially linear dialogs, they found this question staring at them. If the Good is the sun (Plato's metaphor in his culminating story of an escape from the cave) then evil is presumably the darkness: shade. Yet how decode this metaphor? What is...