What did the field studies of Japanese primatologist Kinji Imanishi reveal about bonobos?

Question

What did the field studies of Japanese primatologist Kinji Imanishi reveal about bonobos?​

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Kinji Imanishi's field studies of bonobos revealed the importance of social cooperation among these primates. He observed that bonobos often use sex to diffuse tension and form social bonds, unlike their chimpanzee counterparts who frequently engage in aggressive behavior and competition for resources. Bonobos also exhibit high levels of empathy and altruism towards others in their group, which leads to a more peaceful social hierarchy compared to chimpanzees.

What Did the Field Studies of Japanese Primatologist Kinji Imanishi