Further, it should be clear that meat in itself as protein is not much superior to eggs or nuts and could not alter the evolution of the brain – if this were so, this miracle food would have continued to enlarge humans' brain size in succeeding years when much greater amounts of meat were consumed.
The Heretic's Feast: A History of Vegetarianism (Hanover and London: University Press of New England, 1996), p. 16.