  People disagree about all kinds of things, from whether any milk is left in the refrigerator to whether there is global warming. Some of these disagreements are easily settled; others take a long time, even a hundred years or more, to reach resolution. Moral disagreement is no exception. That disagreement exists regarding moral questions is a sociological fact that is beyond question. Moral disagreements, however, appear to be particularly recalcitrant to resolution. Take the morality of euthanasia or that of capital punishment. Each has been a subject of moral disagreement for a long time. Moreover, it appears that people often disagree even when they agree on non-moral facts. People can, for example, disagree about whether capital punishment is ever morally justified, even when they agree that it has no general deterrence value, because one party believes it is a punishment that “fits” certain crimes, no matter what its other consequences may be.