Here we go again... much of what we know about Bonobos comes from what we have observed about them when they are in captivity. In the wild, they have been known to act differently. The females are NOT necessarily above the males, it is simply more equal than with the VERY patriarchal chimpanzees. Bonobos are one of those animals which liberals like to use to try and justify their radical social ideas. Bonobo females have been known to rape infants of their own kind in captivity, too. They're not a species worth emulating.
There are fewer than 100,000 of these apes left in the world, so we cannot claim that they have been evolutionarily successful; the more patriarchal apes (chimps, gorillas, humans) are far more successful and have spread far more. Furthermore, Bonobos in the wild act far differently than they do in captivity, so in reality, the whole notion of a sex-obsessed ape (that is what the bonobos are claimed to be) may simply be the result of human mistreatment from captivity, not their own nature.