Fields of interest:
Moral and social philosophy
The Order of Public Reason: A Theory of Freedom and Morality in a Diverse and Bounded World, Cambridge: Cambridge University Press, 2011.
On Philosophy, Politics and Economics, Belmont, CA: Thomson Wadsworth, 2008.
Contemporary Theories of Liberalism: Public Reason as a Post-Enlightenment Project, London: Sage Publications, 2003.
Political Concepts and Political Theories, Boulder, CO: Westview, 2000.
Social Philosophy. Armonk, NY: M.E. Sharpe, 1999.
Justificatory Liberalism: An Essay on Epistemology and Political Theory (Oxford Political Theory). New York: Oxford University Press, 1996.
Value and Justification: The Foundations of Liberal Theory (Cambridge Studies in Philosophy), Cambridge: Cambridge University Press, 1990.