The amount of fat and protein in our ancestral diet
Of fruit, nuts and tubers compared to the effort required to obtain meant much of the time was spent foraging. By comparison chowing down on a carcass meant spending the rest of the day sitting around picking our teeth and saying, "you know, Bob, we should figure out a way to do this more often."
( The Light in Chains don't touch the Pope's boner, Tue 16 Aug 2011, 11:48, Reply)