18. According to the UN’s
19. Camel and dromedary curves: Roser 2016g.
20. More accurately, a Bactrian camel; one-humped dromedaries are technically “camels,” too.
21. Camel to dromedary: For another way of showing the same historical development, see figures 9-1 and 9-2, based on data from Milanović 2016.
22. This is also equivalent to the frequently cited $1.25 cutoff, stated in 2005 international dollars: Ferreira, Jolliffe, & Prydz 2015.
23. M. Roser, “No Matter What Extreme Poverty Line You Choose, the Share of People Below That Poverty Line Has Declined Globally,”
24. Veil of ignorance: Rawls 1976.
25. Millennium Development Goals: United Nations 2015a.
26. Deaton 2013, p. 37.
27. Lucas 1988, p. 5.
28. The goal is defined as $1.25 a day, which is the World Bank international poverty line in 2005 international dollars; see Ferreira, Jolliffe, & Prydz 2015.
29. The problem in getting to zero: Radelet 2015, p. 243; Roser & Ortiz-Ospina 2017, section IV.2.
30. The danger in crying “crisis”: Kenny 2011, p. 203.
31. Causes of development: Collier & Rohner 2008; Deaton 2013; Kenny 2011; Mahbubani 2013; Milanović 2016; Radelet 2015. See also M. Roser, “The Global Decline of Extreme Poverty—Was It Only China?”
32. Radelet 2015, p. 35.
33. Prices as information: Hayek 1945; Hidalgo 2015; Sowell 1980.
34. Chile vs. Venezuela, Botswana vs. Zimbabwe: M. L. Tupy, “The Power of Bad Ideas: Why Voters Keep Choosing Failed Statism,”
35. Kenny 2011, p. 203; Radelet 2015, p. 38.
36. Mao’s genocides: Rummel 1994; White 2011.
37. According to legend, said by Franklin Roosevelt about Nicaragua’s Anastasio Somoza, but probably not: http://message.snopes.com/showthread.php?t=8204/.
38. Local leaders: Radelet 2015, p. 184.
39. War as development in reverse: Collier 2007.
40. Deaton 2017.
41. Hostility to the Industrial Revolution among Romantics and literary intellectuals: Collini 1998, 2013.
42. Snow 1959/1998, pp. 25–26. Enraged response: Leavis 1962/2013, pp. 69–72.
43. Radelet 2015, pp. 58–59.
44. “Factory Girls,” by A Factory Girl,
45. Quoted in Brand 2009, p. 26; chaps. 2 and 3 of his book expand on the liberating powers of urbanization.
46. Reviewed in Brand 2009, chaps. 2 and 3, and Radelet 2015, p. 59. For a similar account from today’s China, see Chang 2009.
47. Slums to suburbs: Brand 2009; Perlman 1976.
48. Improvement in working conditions: Radelet 2015.
49. Benefits of science and technology: Brand 2009; Deaton 2013; Kenny 2011; Radelet 2015; Ridley 2010.
50. Mobile phones and commerce: Radelet 2015.
51. Jensen 2007.
52. Estimate from the International Telecommunications Union, cited in Pentland 2007.
53. Against foreign aid: Deaton 2013; Easterly 2006.
54. In favor of (some kinds of) foreign aid: Collier 2007; Kenny 2011; Radelet 2015; Singer 2010; S. Radelet, “Angus Deaton, His Nobel Prize, and Foreign Aid,”
55. Rising Preston Curve: Roser 2016n.
56. Life expectancy figures are from www.gapminder.org.
57. Correlation between GDP and measures of well-being: van Zanden et al. 2014, p. 252; Kenny 2011, pp. 96–97; Land, Michalos, & Sirgy 2012; Prados de la Escosura 2015; see also chapters 11, 12, and 14–18.
58. Correlations between GDP and peace, stability, and liberal values: Brunnschweiler & Lujala 2015; Hegre et al. 2011; Prados de la Escosura 2015; van Zanden et al. 2014; Welzel 2013; see also chapters 12 and 14–18.