Best -selling author and journalist Thomas Ricks speaks with author, political scientist and Professor Danielle Allen about Mr. Ricks latest book, "First Principles." Thomas Ricks has written for the Washington Post and The Wall Street Journal about American military operations around the world. He is the author of several books, including the number-one New York Times bestseller "Fiasco," which was a finalist for the Pulitzer Prize. Danielle Allen is a classicist, political scientist, and professor at Harvard University where she is also the Director of the Edmund J. Safra Center for Ethics. She has written for The Washington Post and published several books and scholarly articles. Professor Allen chaired the bipartisan Commission on the Practice of Democratic Citizenship of the American Academy of Arts and Sciences.