It’s called genetics.
The average IQ of the Ashkenazim is 115. This is also places them much higher than their Asian brothers in Israel itself, which is why Ashkenazi Jews are the richest and the most well off Jews in Israel. Biological differences are more convenient to some people than others.
A similar level of intelligence has been observed in Han Chinese, and they tend to be much smarter than their Tibetan, Uighur, or minority Chinese counterparts. Just as a Han is smarter than an Uighur, a typical Japanese is smarter than the typical Chinese, with the Japanese also showing stunningly high levels of IQ, placing them VERY well on racial comparisons of academic performance. In China, cotton mills owned and managed by Japanese entrepreneurs showed greater efficiency and productivity than nearby competing Chinese managed mills, thus clearly showing the difference between Japanese and Chinese ability to perform.
Such differences are also observed in the United States, with some of the greatest stock intellectual human capital coming from New England. American history seems to be very biased and favourable towards New England states, and many American Presidents have been shown to come from these northeastern states, as have many top leaders in America. These intellectual differences have been very pronounced historically, and thus can be seen from the racial attitudes of Anglo-Saxons of New England origin among Americans, who had a low opinion of the “white trash” in the South, which consisted of Americans of the German, Belgian, Irish, and other European descent - people who normally weren’t in the habit of learning or reading even when they were literate. Examples of the extent of such racial attitudes can even be seen in H. P. Lovecraft’s short stories, in which backward Dutch descended villagers in New Jersey are described as “mongrels”.
Nature is bigger discriminator than humans are, and interestingly, the success of Jews is the success of free society and free market, as their tapped abilities have allowed them, alongside with Anglo-Saxon Americans, to gain high positions in their respective societies, and thus through their merit and achievements, ethnic groups of less intellectual bent have themselves been able to live better lives. At the same time, comparative advantage also helped uplift the once disdained “white trash” of the South, and we observe a Belgian Irish farmboy like Henry Ford becoming a successful entrepreneur, thus revealing another beautiful trait of free society that there is no zero sum to anything, and the best groups overrepresent themselves quickly and gain all the rewards of it, while even the worst groups manage to capture the remaining and untapped opportunities to pull themselves even higher.
That Ashkenazim (perhaps gifted by Jehovah himself with such amazing intelligence) have been bred for intelligence due to their Mercurian nature and tendency towards specialised professions in urban areas did far more for their position in society than all the discrimination they faced that tried to put them down, shows that humans in free society act out of incentives and constraints rather than petty racial attitudes. The greatest genius of the 20th century, Norbert Weiner became a professor in Ivy League schools in Massachussets, despite the barriers to Jews in such organisations, showing that his Jewish-inherited genius was valued more than the fact that he was a Jew of an alien foreign culture.
