… is from pages 198-199 of Maverick, Jason Riley’s splendid 2021 intellectual biography of the great Thomas Sowell:
Most analyses of social and economic intergroup differences focus on the immediate surroundings in which people live. Sowell’s writings exposed the limitations of that approach. He concluded that it isn’t the immediate environment per se, but cultural values and human capital – skills, work habits, saving propensities, attitudes toward education and entrepreneurship, developed sometimes over long period of time – that are the more dominant factors in explaining disparities.