There haven't been fundamental structural changes in America. There's been a very important symbolic change and that is the election of Barack Obama. But the only black people who truly live in a post-racial world in America all live in a very nice house on 1600 Pennsylvania Avenue.

Thousand years ago, we all descended from Africans who left the continent. Those ancestors, we will never know their name. We can go back 200 or 300 years and actually populate your family tree with real people who had names and documents. They had customs, characteristics that, unbeknownst to you, you have inherited. Almost through osmosis it has been passed down to you.

The precise form of an individual's activity is determined, of course, by the equipment with which he came into the world. In other words, it is determined by his heredity.

So when you do your family tree and Margaret Cho does hers, and... Wanda Sykes and John Legend... we're adding to the database that scholars can then draw from to generalize about the complexity of the American experience. And that's the contribution that family trees make to broader scholarship.

The story of the African-American people is the story of the settlement and growth of America itself, a universal tale that all people should experience.

I think literacy is everything.

America is the greatest nation ever founded. The ideals are the greatest ever espoused in human history, and we just need the country to live up to them. But what I worry about are the 1 million black men in the prison system.