Editor’s Note: Frans de Waal’s new book, Different: Gender Through the Eyes of a Primatologist, has generated some controversy and misunderstanding. He will address these issues in a series of short essays which will be published at 3QD and can all be seen in one place here. More comments on these essays can also be seen at Frans de Waal’s Facebook page.
by Frans de Waal

It’s not always easy to talk about bonobos at academic gatherings. There is no issue with fellow primatologists, who are used to straightforward descriptions of sexual behavior and know the recent evidence. But it’s different with people outside my field, such as anthropologists, philosophers, or psychologists. They become fidgety, scratch their heads, snicker, or adopt a puzzled look. Why do bonobos stump them?
One reason for the discomfort is excessive shyness about erotic behavior, which bonobos exhibit in all positions that we can imagine, and even some that we can’t. Moreover, these apes do it in all partner combinations. People assume that animals use sex only for reproduction, but I estimate that three quarters of bonobo sex has nothing to do with it.
But there is a deeper reason why bonobos are the black sheep of our extended family despite being as close to us as chimpanzees. They fail to conform to the traditional model of the human ancestor. Most evolutionary scenarios of our species stress male bonding, male dominance, hunting, aggression, and territorial warfare. This is how our species conquered the earth, it is thought.
Chimpanzee behavior, which can be quite violent, lends support to this narrative. This ape is therefore happily embraced as model. The peaceful, female-dominated bonobo, on the other hand, doesn’t fit. The species is sidelined, such as in “The Better Angels of Our Nature,” in which Steven Pinker calls bonobos “very strange primates.” And Richard Wrangham, in “The Goodness Paradox,” portrays them as an evolutionary offshoot, who “have gone their separate way.” In other words, bonobos may be delightful apes, they are bizarre and irrelevant. Let’s just ignore them! Read more »