It seems there was a tipping point in human evolution where trade and negotiation grew more beneficial to a given tribe (or group of tribes) than attempting to

It seems there was a tipping point in human evolution where trade and negotiation grew more beneficial to a given tribe (or group of tribes) than attempting to kill all your competition through war. You could get the best arrowhead stones without hiking hundreds of miles, for example. Art and culture relatively suddenly spiked roughly around 50,000 years ago. Neanderthals arguably had a bigger brain. It's not raw intelligence that set us apart, it was leveraging social networks (the analog type).