 Caution is needed here, however. Our moral judgments and resulting behaviors cannot just be assumed to be mere causal upshots of some such biological and psychological forces, on a par with the cooperative activity of bees or the resentment felt by capuchin monkeys (or even the broader unease apparently felt by chimpanzees) over unequal rewards for equal work. When a rational agent makes a judgment, whether in the sphere of morality or in such areas as science, mathematics or philosophy, the proper question is not in the first instance what caused that judgment to occur, but what reasons the person had for making it—for thinking it to be true. It is those reasons that typically constitute an explanation of the judgment. They explain by bringing out what the person took (rightly or wrongly) to be the justification for the belief in question—the considerations showing the belief likely to be true. All of this complicates the explanatory project in relation to the thoughts, feelings and actions of rational agents.