Jews first came to Europe in the 8th and 9th centuries, long before they were known for intellectual prowess, Cochran and Harpending say. They worked as traders before taking financial jobs made available by Christians who were forbidden by the Church from charging interest. By 1100, local registries listed most Ashkenazi Jews as lenders.Of course it couldn't be that as the world becomes more and more centered around finance that a certain race of sexually liberated merchants will simply convince large swaths of people through pop culture ("Who are you, Einstein?") that they are the smartest.
That set the stage for natural selection to do its work, Cochran and Harpending theorized. Jews didn’t intermarry, keeping their gene pool closed. They were subjected to periodic persecution, which kept the population from outgrowing its professional niche.
According to the theory, the smartest individuals made the most money, and the wealthiest families had the most surviving children. The genes of the most intelligent Jews spread most, slowly raising the average IQ of the entire group.
Over 40 generations — roughly 1,000 years — an increase of just 0.3 points per generation would have added up to a cumulative advantage of 12 points, Cochran and Harpending theorized. Some of their other models projected a benefit of 16 to 20 IQ points.
Every wonder why a defects like myopia are linked in pop culture with intelligence?

Der Übermensch.
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