World Population and Income: https://delong.typepad.com/world-population-and-income-delong.csv
- Malthusian Economies https://delong.typepad.com/teaching_economics/the-malthusian-economy.html
- Malthusian Perspectives https://delong.typepad.com/teaching_economics/malthus.html
- Gregory Clark (2005): The Condition of the Working Class in England, 1209-2003 https://delong.typepad.com/files/clark-condition.pdf...
- Ian Morris (2010): Why the West Rules–For Now, chapter 3: Taking the Measure of the Past https://delong.typepad.com/files/morris-rules-3.pdf...
- Patricia Crone: Pre-Industrial Societies, selections https://delong.typepad.com/files/crone-pre-selections.pdf
- Wikipedia: Population Growth https://en.wikipedia.org/wiki/Population_growth...
- Wikipedia: Toba Catastrophe Theory https://en.wikipedia.org/wiki/Toba_catastrophe_theory...
- Vaclav Smil (2003): Detonator of the Population Explosion http://vaclavsmil.com/wp-content/uploads/docs/smil-article-1999-nature7.pdf: 'Without ammonia, there would be no inorganic fertilizers, and nearly half the world would go hungry. Of all the century’s technological marvels, the Haber–Bosch process has made the most difference to our survival.... When you travel in Hunan or Jiangsu, through the Nile Delta or the manicured landscapes of Java, remember that the children running around or leading docile water buffalo got their body proteins, via the urea their parents spread on the fields, from the Haber–Bosch synthesis of ammonia...
- Wikipedia: Haber Process https://en.wikipedia.org/wiki/Haber_process#Catalysts: 'The most popular catalysts are based on iron promoted with K2O, CaO, SiO2, and Al2O3. The original Haber–Bosch reaction chambers used osmium as the catalyst, but it was available in extremely small quantities. Haber noted uranium was almost as effective and easier to obtain than osmium. Under Bosch's direction in 1909, the BASF researcher Alwin Mittasch discovered a much less expensive iron-based catalyst, which is still used today...
- Joel E. Cohen (1995): How Many People Can The Earth Support? https://archive.org/details/howmanypeoplecan00cohe...
United Nations (2019): World Population Prospects, 2019 https://population.un.org/wpp/Graphs/Probabilistic/POP/TOT/900: