Reply #8: Their is not complete correlation but I found

[exboyfil]

that educational attainment tracks IQ somewhat.

From an IQ testing house:
Highest level of education attained by age 40
.50 - .58 (actually I am a bit suprised that the correlation is not higher)

From Wikipedia:
"Tambs et al.<81> found that occupational status, educational attainment, and IQ are individually heritable; and further found that "genetic variance influencing educational attainment ... contributed approximately one-fourth of the genetic variance for occupational status and nearly half the genetic variance for IQ". In a sample of U.S. siblings, Rowe et al.<82> report that the inequality in education and income was predominantly due to genes, with shared environmental factors playing a subordinate role."


From Amazon description of IQ and Global Inequality (Perfect Paperback)
by Richard Lynn and Tatu Vanhanen (Author)
"In Chapter 3, we summarize work showing that intelligence is a determinant of incomes and related phenomena (educational attainment and socio-economic status) among individuals in a number of countries;..."


From Abstract of "Small Family, Smart Family? Family Size and the IQ Scores of Young Men"
Sandra E. Black
Paul J. Devereux
Kjell G. Salvanes
NBER Working Paper No. W13336
"Cognitive skills have been shown to be a strong predictor of educational attainment and future labor market success;"

At least in our current society it also makes sense. Irrespective of whether you accept the validity of IQ tests in measuring intelligence (I have my doubts especially after reading Gould's
"The Mismeasure of Man") the underlying assumption of the cited study in the article uses IQ tests to compare to the thickness of the myelin sheath (how they come up with their conclusions). I would contend that, since a great deal of educational attainment (especially in the highly compensated hard sciences) can be tied to the ability to take tests including IQ tests, you would expect the two to track (ie those who perform well in math and sciences also have higher IQ test scores). You couple that with studies showing educational attainment with income, then you can see my point (if marriage is tied to educational or occupational attainment (ie intelligence) and intelligence is genetic, then we will continue to see more of a stratification of have and have nots in society).

I am not saying that I agree with the IQ and genetics question. I am postulating the impact if it is true.