I am a political theorist, specializing in the moral psychology of citizenship, the ethics of migration, punishment, and the history of political thought. I have complementary research and teaching interests in American political development and public law.

I am especially interested in the often troubled relations between equal citizens, whether that manifests in the total rejection of exile or the loss of membership, the drift of particular moral judgments into constructions of criminality, or local-level issues of toleration and association.