Het is bekend dat Ashkenazi Joden een gemiddeld hoger IQ hebben dan andere etnische groepen. Ik zelf denk dat dit genetisch is, maar om dit te bevestigen heb ik meer informatie nodig dus ik zou graag meer informatie over Ashkenazi Joden willen. Ook zou ik graag willen weten of het waar is dat Salomon Bush (Vader van Prescott, dus opa van George Bush sr.) een Ashekenazi Jood was.
Ashkenazi Jews achieve out of proportion with their numbers in areas that presumably require high intelligence. For example, although Ashkenazi Jews represent only about 0.25% of the world population, they make up 28% of Nobel prize winners in physics, chemistry, medicine, and economics, and have accounted for more than half of world chess champions. In the United States, Ashkenazi Jews represent 2% of the population, but have won 40% of the US Nobel Prizes in science, and 25% of the ACM Turing Awards (the Nobel-equivalent in computer science). A significant decline in the number of Nobel prizes awarded to Europeans and a corresponding increase in the number of prizes awarded to US citizens occurred at the same time as Nazi persecutions of Jews drove them from Europe during the 1930s and the Holocaust reduced their number in Europe during the 1940s.
Whether this difference in measured intelligence and achievement is due entirely to a culture of study and vocational training (environment), or partially to a difference in genetic variables, is presently unknown and controversial. (See Race and intelligence)
There are several key observations that motivate our hypothesis. The first is that the Ashkenazi Jews have the highest average IQ of any ethnic group, combined with an unusual cognitive profile, while no similar elevation of intelligence was observed among Jews in classical times nor is one seen in Sephardic and Oriental Jews today. The second is that the Ashkenazim experienced very low inward gene flow, which created a favorable situation for natural selection.
The third is that they experienced unusual selective pressures that were likely to have favored increased intelligence. For the most part they had jobs in which increased IQ strongly favored economic success, in contrast with other populations, who were mostly peasant farmers. They lived in circumstances in which economic success led to increased reproductive success.