Professor of philosophy at Princeton University. He has written extensively on the foundations of quantum physics, philosophy of science, and the relationship between science and theology, with articles appearing in the Journal of Mathematical Physics, Physical Review, The British Journal for Philosophy of Science, and The European Journal for Philosophy of Religion, among others. In 2008 he won a Mellon Foundation New Directions Fellowship, to pursue research in category theory and especially topos theory. Halvorson has received the Cushing Memorial Prize in the History and Philosophy of Physics (2004), Best Article of the Year by a Recent Ph.D. (Philosophy of Science Association, 2001), and Ten Best Philosophy Articles of the Year (The Philosopher’s Annual, both 2001 and 2002).