NPR's Liane Hansen has the second half of her conversation with the authors of two new books on the use of American power in the world. Niall Ferguson is Herzog Professor of Financial History at the Stern School of Business at New York University. He's the author of Colossus: The Price of America's Empire. Walter Russell Mead is the Henry A. Kissinger Senior Fellow in U.S. Foreign Policy at the Council on Foreign Relations. His new book is Power, Terror, Peace, and War: America's Grand Strategy in a World at Risk.
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