Speculate on how the behavioral ecology of nonhuman primates may be in explaining some human behaviors

Anthropologist Frans de Waal has done experiments on bonobos and other primates to show that they use a type of morality. If one bonobo (bonobo A) sees that another bonobo (bonobo B) is being deprived of food, bonobo A may refuse to eat its own food as protest against bonobo B's treatment. This phenomenon demonstrates that nonhuman primates express a form of morality and may help us understand where our own human morality comes from.