https://snyder.substack.com/p/political-violence
http://neilcummins.com/tie_cog.pdf
https://www.project-syndicate.org/commentary/putin-trump-g20-meeting-by-nina-l–khrushcheva-2017-07
https://theconversation.com/ukraine-war-religious-leaders-are-playing-an-important-and-unusual-role-234019