D.Phil., Balliol College, University of Oxford; J.D. Harvard. I am interested in pretty much all areas of philosophy. My current research concerns 1) the nature of normativity 2) the explanatory relation between reasons and values 3) the underdetermination of reasons or values 4) the role of the will in practical reason 5) self-constitution, 6) animal versus human action, and 7) social choice and legal adjudication. I am exploring connections among these topics, each of which grows out of a long-standing interest in the 'incommensurability' of values.