>>13735197Not a biologist by any means, but my guess is: selective pressure. According to the mainstream view on evolution, humans descended from hunter-gathers which descended from a group of apes in savannas in Africa. The trees they lived in so peacefully began to decline in number due to natural climate change, and they had to continually get off the trees to venture out to get food. They could no longer simply sit in canopies and just collect fruits. They had to start walking around eating bugs and occasionally a carcass (hence the introduction of meat and our ability to digest it better). We started as scavengers, then eventually we got smarter and got craft with tools and just chasing shit down with sweating and persistence and so on refining the art of hunting. The thing is, those apes in the beginning were incredibly weak in an open grassland. Large predators easily clapped them and made them dinner. The prey animals are also too fast and large to catch with bare hands. Humans had little to no qualities... Except for: Sweat glands, the arms to throw and above all intelligence. Evolution tends to select for strengths rather than weaknesses, and since intelligence is one of the best traits an animal can have and those primates had intelligence. It's just was nowhere near refined as it is now. Intelligence was absolutely necessary given that the poor apes had nothing else besides sweat glands (for persistence hunting) and throwing arms to work with.
