https://s3.amazonaws.com/happiness-report/2019/WHR19.pdf
https://snyder.substack.com/p/political-violence
http://neilcummins.com/tie_cog.pdf
https://www.brookings.edu/opinions/the-foreign-policies-of-the-sinaloa-cartel-and-cjng-part-iv-europes-cocaine-and-meth-markets/?utm_campaign=Brookings%20Brief&utm_medium=email&utm_content=225208576&utm_source=hs_email