Because he is black, his opinions about race are controversial. If he were white, they probably would be unpublishable. This is a rare case in which we are all beneficiaries of American racial hypocrisy. That he works in the special bubble of permissiveness extended by the liberal establishment to some conservatives who are black (in exchange for their being regarded as inauthentic, self-loathing, soulless race traitors) must be maddening to Sowell, even more so than it is for other notable black conservatives.But of course, it is demonstrable (for me, and Plotinus) that he is not soulless: for after all, soul is our connection to intellect, and therefore to reason. And Sowell must share the same order of reason as this liberal establishment, else he could not understand the rules of their game. (Indeed, the phrase 'capable of understanding the rules' is almost an analysis of the word 'rational'; and notice that it is the potential to understand, rather than the actuality of understanding, that is at stake.)
The unity of the order of reason is one of the few things that survives the most severe skeptical assaults. You can speak of Evil Demons; but an evil demon must share the same order of reason as you in order to fool you. You can question whether you are a Brain in a Vat; but the mad scientist keeping you there must share the order of reason with you in order to be able to fool you.
If you have that, you have everything we really wanted out of metaphysics. Including, as it happens, a soul for Thomas Sowell.