Mark Schroeder is Professor of Philosophy at the University of Southern California. His research ranges widely in ethics, epistemology, and related areas, and his work has appeared in over two dozen journals. He is the author of Slaves of the Passions (OUP, 2007), Being For: Evaluating the Semantic Program of Expressivism (OUP, 2008), Noncognitivism in Ethics (Routledge, 2010), Explaining the Reasons We Share (OUP, 2014), and Expressing Our Attitudes (OUP, 2015)