Ok, but if we're gonna take the evolutionary biology argument here, wouldn't reason dictate that meat was difficault to come by and required a lot of energy to acquire, as opposed to farming plants and hosting livestock. That means that no pre-historic group ate meat everyday, three times a day. Rather, they ate meat a couple of days a week if lucky, and filled the gaps with fruits and roots, all while burning an ungodly amount of resources walking to the next food opportunity.