Nathan Tarcov is Professor in the Committee on Social Thought, the Department of Political Science, the Committee on International Relations, and the College at the University of Chicago, where he received the Quantrell Award for Excellence in Undergraduate Teaching. He received his B.A in history from Cornell and his PhD in political science from Harvard. He was from 1984 to 1992 co-director with Allan Bloom of the University of Chicago's John M. Olin Center for Inquiry into the Theory and Practice of Democracy and from 1992 to 2005 its director, from 2006 to 2008 directed the University's Center for Study of the Principles of the American Founding, and since 2008 has been director of its Leo Strauss Center. He previously was on the faculty at Harvard University, and has served on the Policy Planning Staff of the State Department, as Secretary of the Navy Senior Research Fellow at the U. S. Naval War College, and as Carl Friedrich von Siemens Fellow at the Siemens Stiftung in Munich. He is author of Locke's Education for Liberty and numerous articles on Machiavelli, Locke, Strauss, Quentin Skinner, American political thought, and American foreign policy, and is editor and translator with Harvey Mansfield of Machiavelli's Discourses on Livy, editor with Ruth Grant of Locke's Some Thoughts Concerning Education and Of the Conduct of the Understanding, and editor with Clifford Orwin of The Legacy of Rousseau.