1 U.N. Population Division, World Population Prospects: The 2008 Revision, Population Database, at esa.un.org/unpp, viewed 5 November 2010. Unless otherwise noted, all population data are from this database, in some cases with additional calculations based on them by the author.
2 Gross world product data from International Monetary Fund, World Economic Outlook Database, at www.imf.org/external/pubs/ft/weo/2010/02/weodata/index.aspx, viewed on 8 November 2010. If purchasing power parity is calculated, the developing world proportion of gross world product is much higher, at 48 percent.
3 Alexander Zhukov, deputy prime minister of Russia, “Russia and the World: Challenges for the New Decade,” address to conference, 22 January 2010.
4 U.N. Development Programme, Human Development Report 2010 (New York: 2010), p. 32.
5 Nicholas Eberstadt, “The Demographic Future,” Foreign Affairs, November/December 2010, pp. 54–64.
6 Warren Sanderson and Sergei Scherbov Sanderson, “Remeasuring Aging,” Science, 10 September 2010, pp. 1287–88.
7 Julia Whitty, “The Last Taboo,” Mother Jones, May/June 2010, pp. 24–43.
8 Fertility data from U.N. Population Division, op. cit. note 1, and from ICF Macro/Measure DHS (Demographic and Health Surveys), available at www.statcompiler.com.