The entire interview is worth listening to (not just the part where he agrees with me) for his theories on the intersection of wealth creation, geography and isolation. Basically, to sum it up, if you happen to get stuck in a shithole part of the world, like the Eskimos or the Aborigines, you will stay poor, backwards, and stupid. People need to interact to create wealth and to progress culturally.
I would also interject into his thesis that FREEDOM is absolutely required for the creation of wealth because it ALLOWS people to interact on their own terms. You can't force creative interaction. You can only inhibit it.
Just my two cents, but seeing as how Mr. Sowell and I are BFFs now because we agree on "The Donald," I thought he wouldn't mind if I critiqued him a little...HAHAHA!