Race Differences in Intelligence
The first edition of this book summarized studies on race differences in intelligence published up to 2006. The present second edition adds a large number of subsequent studies published up through the first half of 2014. There are some minor differences in the conclusions; for instance, the average IQ of sub-Saharan Africans has changed from 67 to 71. But the general pattern of results has not shown any significant changes.
The major new feature concerns European peoples. In the first edition, the IQs of these were treated as minor departures from the British IQ of 100, the standard against which all other IQs are calibrated. It has now become evident that IQs are consistently several points lower throughout the far south of Europe, i.e., in the Balkans, Italy, and southern Spain. The explanation for this is that the populations of these regions are a genetic mix of European peoples with those from the Near East and North Africa, with the result that their IQs are intermediate between the parent populations.
The IQs given in the present book are the basis from which the IQs of all nations in the world are calculated and given in my work The Global Bell Curve, as well as books I co-authored with Tatu Vanhanen, IQ and Global Inequality and, most recently, Intelligence: A Unifying Construct for the Social Sciences. We show in these that national IQs explain substantial proportions of the variance across nations in educational attainment, cognitive achievements, per capita income, economic growth, political institutions, health, fertility, and a number of other demographic and sociological variables. These results have been obtained not only by ourselves but by numerous scholars. I cannot list here all the many people who have contributed to these results, but I should like to acknowledge my debt to the important works of Gerhard Meisenberg, Heiner Rindermann, and especially my co-author Tatu Vanhanen.
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