Obviously Western Europe and the US have achieved more on a per capita basis given they are areas where the Scientific Revolution and industrialization occurred

Obviously Western Europe and the US have achieved more on a per capita basis given they are areas where the Scientific Revolution and industrialization occurred. I would say intellectual achievements is driven by the number upper-middle class individuals instead of the entire population. Rough guess of share of present day intellectual production by country (I like to make stuff up): US: 30% Western Europe: 30% China: 15% Japan: 5% India: 5% CIS countries: 5%