Ian Morris, Why the West Rules – For Now (Toronto: McClelland & Stewart, 2010), 626–629.

David G. Myers, ‘The Funds, Friends, and Faith of Happy People’, American Psychologist 55:1 (2000), 61; Ronald Inglehart et al., ‘Development, Freedom, and Rising Happiness: A Global Perspective (1981–2007)’, Perspectives on Psychological Science 3:4 (2008), 264–285. See also Mihaly Csikszentmihalyi, ‘If We Are So Rich, Why Aren’t We Happy?’, American Psychologist 54:10 (1999), 821–827; Gregg Easterbrook, Te Progress Paradox:

How Life Gets Better While People Feel Worse (New York: Random House, 2003).