Humans evolved to be good at long-distance running and carrying weight, which facilitated persistence hunting and global conquest.

“So, the reason we're good at running is because we evolved to run long distances to chase down animals in the heat and spear them. ... So, we'd slowly but surely run down animals. Eventually they would get too hot, they'd topple over from heat exhaustion and then bam, we'd kill them. Okay. So this is a theory called it's called called persistence hunting. ... humans are the only mammal that can pick up a weight and carry it a long distance. And it absolutely shaped us into who we are.”