Originally Posted by Darth InSidious
Well if you want the archaeological theory, we were originally a hunter-gatherer species. That means hunting (meat) and gathering (other foodstuffs), for those who find this stuff difficult to follow. Omnivorousness seems likely. Besides, have you ever tried an all-meat diet? The medieval/early modern European monarchs were into it. Not. Healthy.
Good point Insidious. I think it would be kinda hard to go on an ALL meat diet nowadays.