Pedro Domingos

I didn't say that. Stop making up straw men. Once you take ability into account, the difference in mobility between the US and European countries largely disappears. Refute that or admit it.

How did you not say that? And why is the burden on me to refute such as silly claim? It is your burden to support your claim. I'm not even sure what your claim is. Is it your claim that the distribution of talent is different in US and Europe?

Outcomes are a function of both ability and opportunity, both of which vary within each country. If you ignore ability, you imagine greater differences of opportunity than are really there. Is that clear now?

Social mobility in the US has gone down precisely because the US is ahead of Europe in matching ability to outcomes, assortative mating, etc. (And Piketty is a joke.)

Or, it could be because inequality has grown so much larger, with the powerful rigging the system in their favor. I'll have to reflect more on that. (And much of Piketty is simply showing historical trends in economics -- you don't like the descriptive stats?).

Piketty is cherrypicking and manipulating data to fit a preconceived theory that no serious economist believes in anyway.