PSYCHOHISTORY, branch of mathematics which deals with the reactions of human conglomerates to fixed social and economic stimuli. Implicit is the assumption that the human conglomerate being dealt with is statistically large for valid statistical treatment. A further necessary assumption is that the human conglomerate be itself unaware of psychohistoric analysis in order that its reactions be truly random.

• Isaac Asimov

References

• US Census Bureau.
  • https://www.census.gov/newsroom/pdf/cspan_fb_slides.pdf
  • https://www.census.gov/history/www/through_the_decades/overview/
• Louis Johnston and Samuel H. Williamson, "What Was the U.S. GDP Then?" MeasuringWorth, 2021.
  • http://www.measuringworth.org/usgdp/
• Lawrence H. Officer and Samuel H. Williamson, "Annual Wages in the United States, 1774-Present," MeasuringWorth, 2021.
  • http://www.measuringworth.com/USwages/
• Koepke, Nikola and Baten, Joerg "The Biological Standard of Living in Europe During the Last Two Millennia," in European Review of Economic History 9-1 (2005)
  • https://ourworldindata.org/grapher/average-height-of-men-by-year-of-birth?time=earliest..1790&country=~USA
• Baten, Joerg and Matthias Blum, “Growing Taller, but Unequal: Biological Well-Being in World Regions and Its Determinants, 1810-1989.” Economic History of Developing Regions (2012).
  • https://ourworldindata.org/grapher/average-height-of-men-by-year-of-birth?time=1820..1990&country=~USA
• Human Mortality Database, Hacker (2010), and the US Social Security Administration (2017)
  • https://ourworldindata.org/grapher/life-expectation-at-birth-by-sex?country=~USA
• Median Age At First Marriage, 1890-2010.
  • https://www.infoplease.com/us/family-statistics/median-age-first-marriage-1890-2010
  • https://www.census.gov/content/dam/Census/library/visualizations/time-series/demo/families-and-households/ms-2.pdf
• https://oir.yale.edu/quick-facts
• https://voteview.com/articles/party_polarization
• https://www.youtube.com/watch?v=E4NMZyfao2c