The creation of cognitive-cultural niches and the Baldwin effect are necessary for the development of social cognition. Are there more criteria to be taken into account in the human self-domestication process?
Domestication is still taking place eliminating the unusual, aggressive and volatile. It is now called gentrification. I used this notion in my Cultural Construction of Madness where the latter becomes an example of pre-civilisation and gentrification is associated with sanity.
Gentrification, a clearly modern and interesting process. Although I do not think I can use it in the study of the self-domination of the Homo genus since its inception. However, there could be processes with some similarity.