[4] United Kingdom, Ireland, France, Belgium, Netherlands, Germany, Spain, Portugal, Italy, Switzerland, Norway, Sweden, Denmark, Finland, Austria, United States, Canada, Japan, Australia, and New Zealand.
[5] https://data.oecd.org/inequality/income-inequality.htm#indicator-chart
https://ballotpedia.org/Fact_check/Does_half_of_the_U.S._live_%22in_or_near_poverty%22%3F
[8] https://www.epi.org/publication/usa-lags-peer-countries-mobility/ (15 country comparison)
[9] https://www.epi.org/publication/ib339-us-poverty-higher-safety-net-weaker/ (18 country comparison)
[16] https://www.vox.com/policy-and-politics/2017/6/28/15881246/drug-overdose-deaths-world,
http://www.unodc.org/wdr2017/en/maps-and-graphs.html
[17] https://www.businessinsider.com/countries-largest-antidepressant-drug-users-2016-11 (15 countries in sample)
[20] https://www.businessinsider.com/oecd-homicide-rates-chart-2015-6, https://www.economist.com/united-states/2014/12/11/dont-shoot
[21] http://dx.doi.org/10.1787/9789264261488-en, https://www.economist.com/united-states/2014/12/11/dont-shoot
[28] https://www.statista.com/statistics/263156/water-consumption-in-selected-countries/ (10 country comparison)
[29] https://www.washingtonpost.com/news/worldviews/wp/2013/04/18/unicef-u-s-kids-worse-off-than-many-of-their-western-counterparts/?noredirect=on&utm_term=.6813a812f657
[37] https://read.oecd-ilibrary.org/governance/government-at-a-glance-2017_gov_glance-2017-en#page221
[42] http://internationalcomparisons.org/political/treaties.html (12 countries in comparison)