Bonobos and common chimpanzees have a 99.6% genetic similarity. Among modern humans (Homo sapiens sapiens), there's a genetic similarity of 99.9%. So bonobos and chimpanzees are very similar, kind of like two separate, distinct tribes, if you will. But the bonobo society and behavior is much different from that of chimpanzees. Bonobos have lower sexual dimorphism, i.e. the males look less different from the females. They are highly social (one could say they're more extraverted than common chimps), with groups of dominant females as leaders, and there's high sexual "freedom" which includes high levels of promiscuity and homosexuality. On the other hand, bonobos don't use near as many tools as chimps, and such occasions are not as frequent either. They're also less territorial, with looser social boundaries, and they hardly ever cooperate when it comes to hunting. Don't these traits and trends look all too familiar? And the bonobo society is not collapsing... yet.