His research interests in the area of ethics focus on hybrid ethical theories (in particular, theories that combine consequentialism with elements of Kantian ethics, and their practical implications), meta-ethics, the history of ethics, questions about the relationship between metaphysics and normative ethics (and implications for issues in bioethics), and various topics in applied ethics. His research in the area of political philosophy focuses on multiculturalism, civic virtue and civic education, and the relationship between political ideals and ethical ideals.