Reply #91: Actually...

[Spider Jerusalem]

given the locale in which most early human evolution took place, there's ample reason to believe that it couldn't have been anything OTHER than animal protein, for many reasons. There aren't many high-protein plants in Africa; most of the higher-quality sources of plant protein are either of Asian or New World origins, and prior to the development of agriculture, those there were weren't available in the quantity necessary to sustain the protein requirements of a human population; and the observed behaviour of other primates in the wild tends to confirm ths hypothesis on the assumed basis of similar behavioural characteristics in similar species living in a similar environment (chimpanzees hunt for meat, for instance).

Although I will agree that it's likely that our australopithecene ancestors scavenged or ate insects instead of hunting (but the fossil record also suggests that the early members of genus Homo WERE hunters).