"While only about 2% of the U.S. population is of full Ashkenazi Jewish descent,[2] 27% of United States Nobel prize winners in the 20th century,[2][3] 25% of Fields Medal winners,[4] 25% of ACM Turing Award winners,[2] 9 out of the 19 world chess champions, and a quarter of Westinghouse Science Talent Search winners have either full or partial Ashkenazi Jewish ancestry.[4] However, such statistics do not rule out factors other than intelligence, such as institutional biases and social networks[citation needed].
"The average IQ score of Ashkenazi Jews has been calculated to be 112–115 (Cochran et al.),[8] and 107–115 (Murray; Entine).[9][10][11] These measurements place them as the ethnic/racial group with the highest IQ in the world.[citation needed] A study found that Ashkenazi Jews had only mediocre visual-spatial intelligence, while their verbal IQ (which includes verbal reasoning, comprehension, working memory, and mathematical computation) compensated for this with a high median of 125.6."
There are many groups that have a cultural commitment to education, but they don't produce figures like that. There is, I am afraid, no longer any question among psychologists that IQ is partially heritable.
However, the same Wikipedia article goes on to say:
However, such statistics do not rule out factors other than intelligence, such as institutional biases and social networks[citation needed]. Pretty much what I was saying, with regard to "alternative explanations" that reflect badly on Jewish people.
en.wikipedia.org/wiki/Ashkenazi_Jewish_intelligence