An interesting addition / counterpoint to this theory is presented in Frans De Waal's [1] books. "In 2011, De Waal and his co-workers were the first to report

An interesting addition / counterpoint to this theory is presented in Frans De Waal's [1] books. "In 2011, De Waal and his co-workers were the first to report that chimpanzees given a free choice between helping only themselves or helping themselves plus a partner, prefer the latter." [1]: http://en.wikipedia.org/wiki/Frans_de_Waal http://en.wikipedia.org/wiki/Frans_de_Waal