We evolved living in groups of no more than 200 individuals. Now our cities count people in the millions. It s impressive how relatively peaceful our cities are. It s another testimony to how good we are at adapting, as earlier we adapted to radically different climates. And then there are our cousins the Bonobos, discovered only in 1929.
Copulation is natural in all combinations of sexes.
And females seem to be both dominant and central to bonobo society. Since bonobos are equally close to us as the chimpanzee, we cannot ignore them. It s very hard to draw lines in evolution. De Waal Frans B.M. de Waal was born in the Netherlands in 1948. He trained as a zoologist and ethologist and earned a Ph.D. in biology from the University of Utrecht.