Philosophers tend to distinguish facts from values and claim that we all agree on the facts and disagree on the values. In my experience, the exact opposite is true. We all agree on our values and disagree about the facts. If you look carefully and precisely at what are presented as examples of moral disagreements, I think your own experience will confIrm this claim. Take the example of Star Wars vs. Disarmament. Is there any disagreement in values? Does one side want to blow-up the world and the other side save it? Of course not. Everyone wants to save the world. One side thinks that Star Wars will save it, the other side thinks that disarmament will save it. They disagree about the probable consequences of different courses of action, or what the facts of the case are. They all have the same values—namely avoiding the death and destruction that will accompany any nuclear exchange.
(Bernard Gert, “Morality Versus Slogans,” Center for the Study of Ethics in Society 3 [December 1989]: 3-32, at 26)
