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http://humanprogress.org/f1/2956
https://medium.com/singularityu/why-the-world-is-better-than-you-think-in-10-powerful-charts-9b14b9bbfea8
https://en.wikipedia.org/wiki/Poliomyelitis_eradication
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https://www.statista.com/statistics/274513/life-expectancy-in-north-america/
https://www.infoplease.com/life-expectancy-birth-race-and-sex-1930-2010
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http://humanprogress.org/story/2382
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