Recently I wrote a little about ethicist Derek Parfit. I've been doing further research on him since, and will now describe his Big Picture as I've come to understand it. Parfit believes that the western world only started taking ethical philosophy seriously (as a domain separate from theology) around the time Nietzsche declared that God was dead. There are only three possibilities, in terms of the God/morality issue: 1) You believe that God exists and that His commands define morality 2) You deny that God exists and, like Nietzsche, infer from this that in the absence of commands there is no right or wrong, or 3) You deny that God exists yet persist in believing and attempting to discern right and wrong. From a certain point of view there could be a fourth category, for people who believe that God exists but that His existence is irrelevant to morality, He doesn't issue commands at all, etc. Still, from DP's perspective that sort of God ...