Whole Food Plant Based.
Gladiators were proto-Vegans. Who knew?
I think whole food plant based, with a lucky bird or mammal thrown in for fat or protein once in a while, was the way people ate. The ones who had the best social groups so more people and kids had access to the best hunters, probably became smarter and smarter over generations, though. The evidence is in that animal fat and protein is frontal lobe food. This may be only effective in early childhood or it may well play a part through middle age, helping to prevent dementias. Who knows?