Check this for a headline, followed by some cracking monkey-derived insights and philosophical enquiries.
"
The Two Apes Within Us: Hippy Sex Fiends and Brutal Machiavellians"
"So if humans evolved from apes, which ones are our closest relatives? Dutch primate researcher Frans de Waal spoke with
SPIEGEL about bloodthirsty chimpanzees, sex-crazed bonobos, the origin of the family and the nature of human beings."
We're like chimpanzees because: they're territorial and violent, but they co-operate and make up quickly; they keep women down (but this may have been literally in the interest of preventing a full-on 'Planet of the Apes' scenario - apparently protecting females and babies in the savanna meant we had more of them and is thus "...one of the reasons why we dominate the world today, and not the apes".)
We're like bonobos because: they use sex for reasons beyond reproduction, such as "pleasure and relaxation", "repairing damaged relationships", and preventing infanticide "because bonobo males have sex with all bonobo females, [so] they have no idea which children could be theirs. We call this paternity concealment"; they foster survival techniques through group cohesion; the females dominate but hold grudges.
We're like primates in general because: they display reciprocity and empathy, revealing the possibility of a simian categorical imperative (it has something to do with watermelons and sharing, it's about halfway down).
So we're a mashup, and this is before we even get to thousands of years of social constructivism. A nice summation:
"Imagine if we didn't even know that chimpanzees existed. We would be forced to conclude that our closest relative is a friendly, sex-obsessed hippie, and we would probably come up with all kinds of theories as to where our aggressiveness comes from. It looks as though we have lots in common with both. On the one hand, we're good at making peace and perhaps even more empathetic than bonobos. We certainly have more sex than chimpanzees. On the other hand, we are territorial, power-hungry and even more brutal than chimpanzees."