
https://www.instituteforgovernment.org.uk/sites/default/files/publications/International-civil-service-effectiveness-index-July-17.pdf

https://www.thelancet.com/action/showPdf?pii=S0140-6736%2820%2930468-2

http://www.pewforum.org/2018/05/29/being-christian-in-western-europe/