 Section 2 introduces two key distinctions that are then further developed in Sections 3 and 4. The first distinction has to do with the kinds of evil: insofar as evil is anything at all, is it a deep metaphysical feature of things, or is it always (or at least sometimes) merely an empirical phenomenon? The second distinction has to do with the origins of evil: is evil ever (or always) based in entirely natural phenomena, or does it sometimes (or always) have a moral or supernatural origin?