As far as I understand, early humans evolved from fearful cautious creatures, fo

As far as I understand, early humans evolved from fearful cautious creatures, followed the water round the world, followed the wildlife inland, and that what we found from tribal steppe, and desert pastoral life, is an increasing aggressiveness and impulsivity, and what we found from northern agrarian life was greater docility (patience). This mirrors the testosterone, dimorphism, and neoteny evidence. Peak human is somewhere in the past I suspect.