Rockefeller: The Richest American Who Ever Lived

Was America's first billionaire, John D. Rockefeller, a greedy robber baron, a generous philanthropist, or both? And did the oil tycoon exploit America's poor or give them access to much-needed energy? Historian and Hillsdale College professor Burt Folsom, author of "The Myth of the Robber Barons," reveals the truth about the Rockefeller empire.