Brian Leiter is an expert in moral, political and legal philosophy; constitutional law; evidence; freedom of speech and religion; and academic freedom. He is presently working on projects in moral psychology and meta-ethics (often in relation to Nietzsche), on realism as a theme in political and legal theory, on meta-ethical and metaphysical questions in general jurisprudence, and on philosophical issues about free speech, in both the liberal and Marxian traditions. His work has been translated into Spanish, French, Italian, Chinese, Russian, Portugese, Hebrew, Polish, Slovak and Greek.
Leiter's books include Objectivity in Law and Morals (Cambridge, 2001) (editor), Naturalizing Jurisprudence (Oxford, 2007), Why Tolerate Religion? (Princeton, 2013), and Nietzsche on Morality (Routledge, 2nd edition, 2015). His recent articles have appeared in Analyse und Kritik, Virginia Law Review, University of Pennsylvania Law Review, Criminal Law & Philosophy, and Oxford Studies in Metaethics.