Yes, I think Thomas Sowell and most people on that list use "race" synonymously with "populations with certain phenotypes or ethnicities who are going to be buc

Yes, I think Thomas Sowell and most people on that list use "race" synonymously with "populations with certain phenotypes or ethnicities who are going to be bucketed together as such." Culture isn't the only thing by which he differentiates people bucketed across "races," but is definitely a primary one. He also very frequently talks about cultures within "races," as you've mentioned here. The drastically different performances between white immigrants to the US, depending on where they came from. Or the stellar performance of black immigrants from Nigeria or Ghana or the West Indies.