If you found IQ and Populations interesting, and especially if you’re curious about the derivations of the National IQ figures, please see this post from Steve Sailer in which he discusses “IQ and the Wealth of Nations”…
The IQ structures of the two giga-countries, China and India, demand more intense study, in part because the future history of the world will hinge in no small part on their endowments of human capital. The demography of India is especially complex due to its caste system, which resembles Jim Crow on steroids and acid. By discouraging intermarriage, caste has subdivided the Indian people into an incredible number of micro-races.  In India, according to the dean of population genetics, L.L. Cavalli-Sforza, “The total number of endogamous communities today is around 43,000…” We know that some of those communities – such as the Zoroastrian Parsees of Bombay – are exceptionally intelligent.
He also considers the Flynn Effect, nutrition, and the remarkable gap in IQ figures between Americans of African descent and present-day Africans.
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