https://www.brookings.edu/articles/disquiet-in-the-worlds-middle-class/
http://www.ips-journal.eu/topics/european-union/article/show/eu-assurance-co-2037/
https://uk.yahoo.com/finance/news/uk-conservatives-resurge-scots-shun-083526752.html
https://english.bdi.eu/media/presse/presse/downloads/20180308_Climate_Paths_for_Germany_ExecutiveSummary_FINAL.pdf