She concentrates on the study of ancient Greek philosophy, including Ethics, Psychology and Epistemology. Her current research interests are in Platonic ethics. She was elected a Fellow of the American Academy of Arts and Sciences in 1992,[1] and a Fellow of the American Philosophical Society in 2013.[4] She is the founder and former editor of the annual journal, Oxford Studies in Ancient Philosophy.[5] She is married to the Hume scholar, David Owen, also a professor of philosophy at the University of Arizona.