No need for hostility either way, I think my comment was pretty gentle in pushing back on something I said "might" be a perception. So our ability to walk long

No need for hostility either way, I think my comment was pretty gentle in pushing back on something I said "might" be a perception. So our ability to walk long distances in moderate to high temperatures is what allowed us to thrive on the plains vs jungles of Africa, before we were modern humans. As far as modern humans go, it wasn't a single wave of migration, or even multiple waves of migration. The more we learn the more we realize it was more like diffusion of increasingly advanced culture across a mesh that pre-existed across the globe. Our distance endurance was literally useful for traveling to new and better places as hunter gatherers, or simply following seasons. But it also enabled very specific tactics like persistence hunting or steering entire herds into human designed funnel traps. Near as I can tell from reading these were pretty key to our rise at a critical time. Then of course, language and the accumulation of knowledge it enables was the huge jump to modernity. We'd like to think we're far past that jump but we really aren't, we've just gotten so good at cracking rocks against each other now they're on the cusp of thinking the same way we do.