“By the 20th generation 35% were 'elite', and by the 30th generation 70% to 80% of the selected generation was 'elite.'" https://en.m.wikipedia.org/wiki/Domesticated_silver_fox
"Central to his argument is the idea that cooperative killing of incurably violent individuals played a central role in our self-domestication. Much as the Russian scientists eliminated the fierce fox pups from the breeding pool, our ancestors killed men who were guilty of repeated acts of violence." https://www.theatlantic.com/magazine/archive/2019/03/how-humans-tamed-themselves/580447/
