Research: Moral philosophy (metaethics, medical ethics, military ethics), and philosophy of language (speech-act theory, pragmatics).

Selected Publications: Author of War and Ethics: A New Just War Theory (Continuum, 2008); Moral Situations and Military Ethics: Looking Toward the Future. Co-Author of Terrorism: The New World Disorder (Continuum, 2008); Military Ethics and Toleration. Co-Editor of Moral Constraints on War: Principles and Cases (Rowman & Littlefield, 2nd ed. 2008); Hare and Critics: Essays on "Moral Thinking". Currently writing a book on the topic of moral thinking.

Fellowships and Honors: Fulbright Professor, Yonsei University, Seoul, springs of 1984 and 1988, and 1991-92.