Do Ashkenazi Jews have a genetic advantage when it comes to intelligence?
The Utah researchers Gregory Cochran, Jason Hardy, and Henry Harpending proposed that Ashkenazi Jews have a genetic advantage in intelligence, and that the advantage arose from natural selection for success in middleman occupations (moneylending, selling, and estate management) during the first millennium of their existence in northern Europe, from about 800 C.E. to 1600 C.E.