Psychologist Byron M. Roth reviewed Richard Lynn’s 2011 book The Chosen People: A Study of Jewish Intelligence and Achievement:
The most notable difference among Jewish groups is average IQ. While the Ashkenazi average is 110, the Sephardic average is about 99, close to that of Europeans. The Mizrahim score about 91, markedly lower than Europeans, but higher than the Arabs with whom they have lived, whose average is about 84. The genetically distinct Falashas have IQs of about 70, typical of sub-Saharan people.
These IQ differences have had an important impact on the achievement of each group. This is especially clear in Israel, where they live side by side. The Israeli population of about 6 million people (in 2000) is about 40 percent Mizrahim, about 40 percent “European,” and about 20 percent Arab Muslims. Comparisons are complicated, however, because the 2.4 million characterized as European include 110,000 Sephardim. Furthermore, many in the group classified as European Jews are immigrants from Russia, a large number of whom—some Israeli demographers estimate as many as 900,000—are not Jews at all. They are ethnic Russians “who pretended to be Jews in order to obtain permission to leave the Soviet Union.” For these reasons the average IQ of those classified as European Jews is estimated to be about 106, lower than would be the case if all were Ashkenazim.Nevertheless, on all measures of social and educational success, the Europeans do better than the Mizrahim, who in turn do better than the Arab citizens, a ranking perfectly consistent with IQ estimates. Of particular interest are the Ethiopians, who do very poorly, and behave like American blacks. According to an Israeli researcher, many “identify with an ‘aggressive and semi-criminal African-American youth culture’ and have become a ‘kind of ethnic underclass.’”
…In general, Jews do not differ in any appreciable way from Gentiles in the things they value, with one exception: They have a greater desire to achieve economic and social success, that is to say, they are high in “achievement motivation.” Professor Lynn suggests that, like many personality variables, this may have a partly genetic basis “brought about through having been selected by eugenic customs, persecution, and discrimination.”
