[jononomo]

Can you try to explain your point at some greater length, perhaps?

My point is that when viewed through the lens of economics, meat was a vastly less expensive way for ancient human beings to obtain calories than plants were.

The situation for ancient human beings would be equivalent to a situation today (for modern human beings) in which 3000 calories of fruits and vegetables would cost $500, whereas 3000 calories of steak would cost $10.