20. For example, Paul Varg, Foreign Policies of the Founding Fathers (New York, 1970) and more recently Robert W. Tucker and David Hendrickson, Empire of Liberty: The Statecraft of Thomas Jefferson (New York, 1990) and Walter Russell Mead, Special Providence: American Foreign Policy and How It Changed the World (New York, 2001). A persuasive critique, at least for Jefferson, is Lawrence S. Kaplan, "Jefferson as Idealist-Realist," in "Entangling Alliances with None": American Foreign Policy in the Age of Jefferson (Kent, Ohio, 1987), 3–23.