Relative position also matters quite a bit. In Denmark, you can be born on the lower end of society, and end up as one of the country's elites, with greater probability than is the case in the US. I take this as the "Horatio Alger" myth: you are born to a dock worker, and end up President of the USA, or CEO of a Big Company, a unique trajectory only possible in America. But you are actually more likely to make this dockworker-to-PM or dockworker-to-CEO transition in Denmark, contrary to the myth! Put differently, who constitutes the elite in Denmark is less determined by parentage, whereas the American political/economic/cultural elite is more heredity-determined, because the differences from birth are too large to overcome. I think this question of which stratum of the previous generation's families this generation's CEOs/etc. come from has significant implications for society: if it's only from last generation's top-20%, this produces a multi-generational elite, which is generally bad. It could well be that one way to combat the emergence of a multi-generational elite is simply to reduce income inequality.