Professor Roth holds a joint appointment with the Department of Political Science. He specializes in international law, comparative public law, and political and legal theory. His courses include International Law, International Protection of Human Rights, International Prosecution of State Actors, U.S. Foreign Relations Law and Political Theory of Public Law. Before entering academia, he practiced law and served as law clerk to the chief justice of the New Jersey Supreme Court.

He is the author of Sovereign Equality and Moral Disagreement (Oxford University Press, 2011), Governmental Illegitimacy in International Law (Oxford University Press, 1999), contributing co-editor (with Gregory H. Fox) of Democratic Governance and International Law (Cambridge University Press, 2000), and author of roughly 30 book chapters, journal articles and commentaries dealing with questions of sovereignty, constitutionalism, human rights and democracy.