I don’t know if there is any truth in morality that is comparable to other truths. But I do know that if moral truth exists, establishing it at the at the most fundamental level is hard to do. Especially in the context of passionate moral disagreement, it’s difficult to tell whose basic moral values are the right ones. It’s an even greater challenge verifying that you yourself are the more virtuous. When you find yourself in a moral stalemate, where appeals to rationality and empirical reality have been exhausted, you have nothing left to stand on but your deeply-ingrained values and a profound sense of your own righteousness. You have a few options at this point. You can defiantly insist that you’re the one with the truth – that you’re right and the other person is stupid, morally perverse, or even evil. Or you can retreat to some form of nihilism or relativism because the apparent insolubility of the conflict must mean moral truth can’t exist. This wouldn’t be psychologically satisfying, though. If your moral …