So many people of color who made major contributions to American history have been trapped in the purgatory of history.

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.

In a one-hour documentary, you can tell maybe ten stories. That's how the documentary is structured. I wrote to forty of the greatest historians of both African and African-American history, and hired them as consultants. I had them submit what they thought were the indispensable stories, the ones they felt this series absolutely had to include.

The historical basis for the gap between the black middle class and underclass shows that ending discrimination, by itself, would not eradicate black poverty and dysfunction. We also need intervention to promulgate a middle-class ethic of success among the poor, while expanding opportunities for economic betterment.

Like the amazing story of Anthony Johnson. This man was a slave, then became free, accumulated 250 acres, and even had his own slave, a black man who took him to court in Virginia in 1654.That man argued that he should be freed like an indentured servant. But Johnson, who we believe was a pure African from Angola, said, "No way, you're my slave." And the court agreed.

Wherever you go in the history of America, there have been Black people making contributions, but their contributions have been obscured, lost, buried.

In fact, the class divide in the black community is now seen by some as a permanent aspect of our existence.