Well the african, neandertal, denisovian evolutionary deistribution is no differ

Well the african, neandertal, denisovian evolutionary deistribution is no different from the african, west eurasian, east asian evolutionary distribution. And it’s extraordinarily likely that the same distribution persisted throughout hominid history. The difference is that eurasia is an east-west distribution, and africa a north-south distribution, so as the climate varied, proto-humans could migrate with the climate, and african climate would adapt to the world climate. Once out of africa, the trend continued except it continued into cold. Cold is interesting because it decreases the disease gradient, decreases competitors, and predators, but preserves if not increases food availability since animals that surive the cold have the same benefits from it as humans. In other words, as soon as you can ccompete with the cold, its easier to compete with the cold than it is to compete with disease, competitors, and predators.