Manuel Vargas is Professor of Philosophy at the University of San Francisco. His principal areas of research include responsibility, moral psychology, and Latin American philosophy. He received his joint-PhD in philosophy from Stanford University. He is the co-author of Four Views on Free Will (Blackwell, 2007) with John Fischer, Robert Kane, and Derk Pereboom, and co-editor of Rational and Social Agency: On Themes in the Philosophy of Michael Bratman (OUP, forthcoming) with Gideon Yaffe.