The College has supported the study of philosophy since its foundation and many distinguished philosophers have been Fellows, including Isaiah Berlin, J. L. Austin, Bernard Williams, Michael Dummett, Susan Hurley, and G. A. Cohen. The College provides fellowships to the Chichele Professor of Social and Political Theory and to the University Lecturer in Medieval Philosophy, currently Professor Cecilia Trifogli, whose research focuses on the reception of Aristotle and other topics in the philosophy of the Middle Ages. Two Senior Research Fellows work in philosophy: Susanne Bobzien, whose research interests include ancient philosophy and the philosophy of logic and language, and Cécile Fabre, who works in moral, political, and legal philosophy, specializing in the ethics of war. Hanna Pickard is a Fifty-Pound Fellow working in the philosophy of mind and the philosophy of psychiatry, where her research is informed by her work as a therapist. Daniel Rothschild is a Fifty-Pound Fellow working on the philosophy of language and linguistic semantics. Emeritus Fellows include Myles Burnyeat, Edward Hussey, and, until his recent death, Derek Parfit. The College also provides a Visiting Fellowship to the lecturer chosen by the Faculty of Philosophy to deliver the annual John Locke Lectures, and regularly supports other Visiting Fellows working in philosophy.