Their [biologists] conclusions are derived in part from testing very young children, and partly from comparing human children with those of chimpanzees, hoping that the differences will point to what is distinctively human. The somewhat surprising answer at which some biologists have arrived is that babies are innately sociable and helpful to others. Of course every animal must to some extent be selfish to survive. But the biologists also see in humans a natural willingness to help ... “That’s why we have moral dilemmas,” Dr. Tomasello said, “because we are both selfish and altruistic at the same time.”
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