Thomas Sowell wrote "Ethnic America", exploring why different ethnic groups do better or worse than others in the American milieu, but he also discusses different ethnic groups and cultures around the world. For instance, Jews tended to be more successful in urban-type jobs (clerks, lawyers, educators, etc.) than rural, e.g. farming. Jews newly immigrating to the US and still living in tenements tended to have the same rates of public library use as native-born middle class Americans. They were in the slums, but the slums were not in them. Chinese, Arabs, Persians, and Indians who emigrate tend to be in merchant or small businessman class wherever they end up, even if they were not merchants back home. Could have to do with the temperament of someone who is willing to leave hearth,home and the familiar and take on the responsibilities of a new, different society.
Germany was long known as the "land of poets and philosophers", until the rise of Nazism and it was done in by its poets and philosophers.