I differ from you both in that ascribe to an objective moral reality -- there exists an objective right and an objective wrong for at least some situations. We can try to identify what the right and wrong is, and we can be correct or incorrect in our conclusion, but our conclusion does not change rightness or wrongness. Revo, I am well aware that you disagree.

All objective moral realities necessitate a moral authority -- I'm closest to a Modified Divine Command Theory, as per Adams.