IQs of White Couples With the Same Educational Levels of Education

Cognitive ability is just kind of a marker for having shared culture. The substance of their education also sorts them into occupations that increase the likelihood they will eventually marry people with similar characteristics. Back in the days when Harvard men and Wellesley women were more likely to be rich than to be especially smart, this meant that money was more likely to marry money. On average, children are neither as smart nor as dumb as their parents. They are closer to the middle. This tendency is called regression to the mean. It exists independently of genes.