But that doesn't mean that their, the way they thought or that their brains were the same as modern humans. And so maybe in this period, the human brain just wasn't capable of performing or thinking of agriculture. Other theories are, is that the human population through hunter-gathering kept increasing over time, and it was right after the last Ice Age that you really got close to this critical mass of population, at which point, for every extra human to be born, well, another human would not be able to live or not be able to be born because there was a fixed supply of food as hunter-gatherers. And so you could say out of necessity, maybe a tribe here or a little group there started to say, hey, what if we started to, if we started to domesticate some of this cattle or if we started to plant crops, all of a sudden they would start to have a higher density and their population could increase. And not only would they be able to survive, but they could also be very dominant in things like conflict. Once you start having agriculture and as agriculture advances, as I mentioned, these people could be more sedentary. They wouldn't have to move around.