One theory is that humans self-domesticated while selecting for those who were more agreeable to living in civilization, similar Bonobos which also retain addit

One theory is that humans self-domesticated while selecting for those who were more agreeable to living in civilization, similar Bonobos which also retain additional neotenous features. https://www.scientificamerican.com/article/tame-theory-did-bonobos/ https://www.scientificamerican.com/article/tame-theory-did-b...