
                   Richard Lynn's Race  Differences in Intelligence: Above is a graph showing the  average IQ from 23 studies of Japanese people in Japan (red), 17 studies of  Hispanics in the U.S. (green), and 17 studies of Aborigines in Australia (blue).  The horizontal axis is the estimated average year born of the sample studied.  The virtually horizontal colored lines are the best fit lines. While there is a  lot of noise in the data, the stability over the generations is striking.
                    
                   Ever  since the publication of Richard Lynn and Tatu Vanhanen's IQ  and the Wealth of Nations more than four years ago, I've been beating  the drums about how hugely important is their finding of a high correlation  (r = 0.73) between average national per capita GDP and average national IQ.
  more than four years ago, I've been beating  the drums about how hugely important is their finding of a high correlation  (r = 0.73) between average national per capita GDP and average national IQ.
Yet this fascinating research has been almost completely spiked in the  press. For example, you might think that The Economist would owe its $129-per-year  subscribers some coverage of this research that has so many implications for  international business and investing.
Yet the only time The Economist has mentioned the book was in citing it  as the source when the magazine fell for that bogus  blue-states-have-higher-IQ-hoax!
Now, Lynn has a new book out, Race  Differences in Intelligence, which tabulates 620 separate studies of average  IQ from 100 different countries with a total sample size of 813,778.  That's nearly four times the number of studies summarized in his book with  Vanhanen. (Here is J.P.  Rushton's review on VDARE.com, and here is Jason  Malloy's review on GNXP.com.)
  which tabulates 620 separate studies of average  IQ from 100 different countries with a total sample size of 813,778.  That's nearly four times the number of studies summarized in his book with  Vanhanen. (Here is J.P.  Rushton's review on VDARE.com, and here is Jason  Malloy's review on GNXP.com.)
This profusion of data allows us to do analyses of important issues that haven't  been feasible before.
How do high IQ people  rationalize to themselves suppressing mention of national differences in average  IQ—especially when they spend so much time thinking about how they,  personally, are smarter than other people?
A common stratagem, I've found, is to assume that IQ differences matter only  if they are genetic in origin. Since no decent,  civilized, right-thinking person could possibly  believe that racial differences in IQ have any genetic basis, then racial  and national differences in average IQ can't possibly exist.
Except—they do exist.
 
And, as I will show that—no matter what their origin, whether in nature or  nurture or both—these IQ gaps will continue to exist for many decades.
So we need to think about differences in thinking.
 Here's  an above-average quality example  of the usual kind of wishful thinking from James C. Bennett, author of The  Anglosphere Challenge: Why the English-Speaking Nations Will Lead the Way in the  Twenty-First Century, on his interesting Albion's  Seedlings blog...
Bennett's replies, in part:
“The whole question of trying to make conclusions about ‘national IQs’  from these tests is problematic. Differential national IQ rates could mean that  there are inherent differences in IQ, but they could just as easily mean that  the socio-cultural-economic differences between nations produce differential IQ  scores for environmental reasons… In a few years further genomic  studies and fMRI imaging of the brain will tell us far more about heredity  and intelligence (and the nature of intelligence) than we can infer today from  the wide and rather problematic assortment of statistical studies available  today. I think speculation about it is a waste of time right now.”
But (as I responded) it makes no sense to assume that existing IQ gaps have no  real-world impact just because they might prove not to be genetic. The  overwhelming fact is that—whatever the causes of the disparities may turn out  to be—the gaps exist.
And the crucial point is that China appears to have a lead on India of at least  one standard deviation (by Lynn's estimate, 1.5 standard deviations or 23  points). From all we know about national IQ trends over time, the possibility of  that gap disappearing before, say, 2050, is very small.
Relative differences in average national IQs change even more slowly than, say,  relative differences in average national height, which take a couple of  generations to fully work through the system.
Since IQs are quite stable  from childhood through adulthood, a trailing population's main hope for closing  the gap with a higher IQ group rests on its future children.
Let's look at a stylized example. Assume that the IQ gap between two  populations, such as China and India, is currently 15 points. And, assume that  the babies being born tomorrow in India are suddenly as smart as the babies  being born in China.
The red line reflects the growth in the trailing country's workforce's average  IQ if the gap disappeared among all babies born in 2006.
The subsequent narrowing of the workforce disparity wouldn't even begin  until the 2006 babies started their careers at age 18 in 2024.
If the retirement age is 65 and the population remains stable, then the gap  would only be half-closed by 2047, and wouldn't disappear until 2071 (red line  in graph below). If it took 2 generations for the average IQs of newborns to  catch up, convergence in the workforce wouldn't happen until the 22nd Century  (blue line):
  
                           
                            
                           So,          these gaps will remain crucially important for generations to          come.   [More]
                            
                           A reader writes:
                            
                   Average IQ  is not the only relevant factor, and not even clearly the most important  relevant factor in assessing, let's put it this way, the relative baseline value  of China's and India's human capital. The variance also matters a great deal, as  does the specific distribution of talents beyond the raw IQ score.
I would assume Brazil has a significantly lower average IQ than Argentina. But  Brazil has a substantial enough population at the high end of the IQ spectrum  which, combined with a more creative and entrepreneurial culture, has made  Brazil a far more dynamic and important country than Argentina is. (Argentina's  dreadful economic policies obviously hurt that country as well, but Brazil's  economic policies haven't been exactly world class for much of its history  either.)
  
 Indeed, Brazil is one of  only four places in the world to compete in the commercial jetliner market. On  the other hand, the latest per capita GDP for Argentina is $13,700 versus $8,400  for Brazil. As the saying goes, "Brazil is the country of the future and  always will be."
  
 Amy Chua  in her book, World on Fire, describes the dangerous downside of having  market-dominant minorities. But the upside, for countries from Malaysia to  Russia to South Africa to Brazil, has been substantially greater economic  development than would have been possible otherwise.
So assume for the sake of argument that India has a very substantial minority of  the population (say, the top quintile or decile) that is at least as smart as  the comparable segment of the Chinese population. This could certainly be the  case if the standard deviation of Indian IQ is substantially higher than for  Chinese IQ, and/or if a big reason for the IQ gap between the two countries is  relative malnutrition of the huge rural Indian population. Assume further that  India has certain cultural advantages, some of which may be related to the  natural endowments of the population and others of which are pure accidents of  history (like the British colonial inheritance). Assume further that the caste  system in India actually serves to bind the market-dominant minority of Indians  to the rest of the population (the Hindus, anyway). If all of these assumptions  are true (which is a big if, admittedly), I think you could make a strong case  for betting on India in spite of the gap in average IQ.
  
 One interesting sidelight  is that both countries' educational policies appear to be rationally taking into  account the apparent difference in IQ variances between them. India has invested  a lot in elite higher education, while China has done a better job of getting  the masses up to a minimum level of education, while skimping so far on world  class higher education.
 
My published articles are archived at iSteve.com -- Steve Sailer