alt Hacker News> pretty clear that prehistorical lifestyles weren't just small tribes slaughtering each other,
Well, that's sounds quite logical. When you kill people, they usually fight back. Very strongly fight back. So you have to expect something big to make it worth it. But small very undeveloped tribes had nothing of such, so they have no incentives to slaughter each other.
> But small very undeveloped tribes had nothing of such, so they have no incentives to slaughter each other.
With neither size nor technology to make a lasting impact, the ones that got slaughtered didn't exactly leave much in archeological evidence behind for us to find.
As for GP's point, obviously those people weren't bred for battle with others. All the tiny tribes would happily frolic in the forest or whatever small prehistoric tribes did when they weren't starving, but eventually they'd grow in size, hit a size limit leading to a new tribe splitting off, etc.; over time, the number of tribes grew to the point that they started to bump into each other and contest the same resources, leading to the obvious outcome.