And we know that from the time of Rome till now, another 2,000 years with agriculture, our population has gone up 28x. It's growing exponentially to seven billion. And there's no way that we could have had this level of density without agriculture. Now, a key question is, is why did agriculture emerge right then? Well, one theory is, is well, it seems to be only, and I put only, I'll say only in quotes, only a few thousand years after the end of the Ice Age, maybe you had positive climate change, at least from a human point of view, that allowed land to be, to support agriculture. That seems like a reasonable theory. Although you might say, well, we've had other periods where we didn't have an Ice Age.