It's not that I disagree with his use of statistics, but my own philosophical framework (particularly inspired by the ideas of J.E. Roemer, Gerry Cohen, Nitzan & Bichler, and more recently Roberto Veneziani) sees serious problems (I think exploitation, domination, alienation, and insufficient focus on capabilities qua equality of opportunity) with not only capital in general but the state too.

I can't easily recall the statistics or framework he used, though the disagreement between our frameworks of society (such as methodological individualism) was what stood out to me. I recall Pikkety making a more convincing case on the economic side, and Frederic Lordon making a more convincing case on the philosophical side. I also disagree with Sowell on his position on sweatshops (again, not rejecting the principle on which it is made, which is that the workers would not be employed otherwise, or have lower wages from domestic companies, but rather a disagreement on the reach and justification of that argument).