Duke anthropologist Brian Hare argues that humans evolved in a way that left us more cooperative and friendlier than our now extinct human cousins, like Neanderthals and Denisovans.
Bonobos are much more likely than common chimpanzees to share their food, a study suggests. But researchers who study sharing say human kids are more helpful and cooperative than either species.
Given a choice, bonobos tend to prefer people who act like jerks and dominate. That's very different than humans, who even as infants consistently prefer people who are cooperative and not mean.
