He is the author of Constitutional Conservatism: Liberty, Self-Government, and Political Moderation (Hoover Institution Press, 2013); Israel and the Struggle over the International Laws of War (Hoover Institution Press, 2012); Virtue and the Making of Modern Liberalism (Princeton University Press, 1999); and Nietzsche: The Ethics of an Immoralist (Harvard University Press, 1995).
He is the editor of seven collections of essays on political ideas and institutions published by the Hoover Institution: Renewing the American Constitutional Tradition (2014); Future Challenges in National Security and Law (2010); The Future of American Intelligence (2005); Terrorism, the Laws of War, and the Constitution: Debating the Enemy Combatant Cases (2005); Varieties of Conservatism in America (2004); Varieties of Progressivism in America (2004); and Never a Matter of Indifference: Sustaining Virtue in a Free Republic (2003).
With coeditor Tod Lindberg, he launched Hoover Studies in Politics, Economics, and Society, a series of concise books on leading issues published in cooperation with Rowman and Littlefield.
He has written articles, essays and reviews on a range of subjects for a variety of publications, including the American Interest, the American Political Science Review, the Atlantic, the Boston Globe, the Chronicle of Higher Education, the Claremont Review of Books, Commentary, Critical Review, First Things, Forbes.com, Haaretz, the Jerusalem Post, the London Review of Books, National Journal, National Review, the New Criterion, the New Republic, the New York Post, the New York Sun, Perspectives on Politics, Policy Review, Politico, the Public Interest, Real Clear Politics, the Times Literary Supplement, the Wall Street Journal, the Washington Post, the Washington Times, the Weekly Standard, the Wilson Quarterly, World Affairs, and the Yale Law Journal.
He taught constitutional law and jurisprudence at George Mason University School of Law from 1999 to 2006, and political philosophy in the department of government at Harvard University from 1990 to 1999.
He holds a JD and a PhD in political science from Yale University; an MA in philosophy from the Hebrew University of Jerusalem; and a BA in English literature from Swarthmore College.