I can't view the video but since Pinker is mentioned in other comments I assume it is a summary of this (not yet read) book on my bookshelf: https://en.wikiped

I can't view the video but since Pinker is mentioned in other comments I assume it is a summary of this (not yet read) book on my bookshelf: https://en.wikipedia.org/wiki/The_Better_Angels_of_Our_Nature https://en.wikipedia.org/wiki/The_Better_Angels_of_Our_Natur...