Social Evolution

In my primatology and human evolution class, we often talk of primate violence. Recently, a domesticated chimpanzee mauled a women nearly to death in the tri-state area. Chimpanzees have also been known to throw stones or feces as a violent behavior, as well as engage in cannibalism with their young. I believe that in some way this violent and pain causing behavior must relate to our own social evolution. Although behaviors are labile and varied, what can we infer from this example as well as other examples of violent primate behavior in comparison to our own behavior? Very interesting.