Carnivore was essentially the diet all humans were on before they discovered agriculture.
Not really. Fossils show worn teeth from chewing vegetable matter, and for that matter, they're not even the right teeth for carnivores. We have four nearly blunt canines and incisors that would not be at all good for ripping flesh, and that's about it for meat-eating. Meat was definitely preferred, but not always available. Hunter-gatherer was a thing for a reason. Generally males hunted, returning with meat when they could, while females gathered, both for sustenance when hunting wasn't working out as well as to have seasonings and add flavor to meat when it was available to be cooked.
Artifacts show that even early in humanity's history, cooking was a thing and there were even fairly complex methods of preparing meat and vegetable foods and making them palatable, probably even preceding language as we'd recognize it.
Later, agriculture made actually setting up permanent settlements a logical thing to do, and with that also came animal husbandry, both for meat and for other animal products.
The hunter-gatherer lifestyle was remarkably stable, though, with the few remaining uncontacted tribes who live that way having done so, more or less in the same way, for tens of thousands of years or even longer.
It really doesn't survive contact with modernity very well, though, because almost anyone presented with a choice between the two in their formative years will choose modernity (whether or not that is good).
Maybe his dick got hacked lmao.