Human IQ average to be 82 by 2100 The dark blue line is the average IQ of the world. I've also plotted the population growth of the five most populous countries, India, China, the U.S., Indonesia, and Nigeria; the average IQ of each of these countries is in parenthesis. (Nigeria is currently ninth, with Brazil (87), Pakistan (81), Russia (96), and Bangladesh (81) intervening, but by 2050 it will be fifth.) As you can see, in a 100 year period the world's average IQ will have dropped from 92 to 86, a change of 6%. That is pretty darn significant. And all because of differential population growth. I extrapolated the population growth of each country another 50 years to the year 2100 (lightly shaded region of graph). At that time the world's average IQ will have dropped below 84. Within this time period of 150 years, extremely short by any evolutionary standard, an incredibly significant change in this key metric will have occurred. And there is no sign of the trend bottoming out, because the growth rate of countries with lower IQs exceeds the growth rate of countries with higher IQs. The most populous country today is China, which has a high IQ (100), but its growth is actually projected to be negative because of their "one child" policy. After about 2030 India will be the most populous country, and it has relatively low IQ (81). At current growth rates by 2100 Nigeria will be the third most populous country, and it has a low IQ (67). http://www.gnxp.com/MT2/archives/000953.html We'll be dumb as chimpanzees and orangutans!