Robert Pasnau is Professor of Philosophy at the University of Colorado. He received his PhD in 1994 from Cornell University, and has published widely on the history of philosophy. He won the APA Book Prize for Thomas Aquinas on Human Nature (CUP, 2002), and has more recently published The Cambridge History of Medieval Philosophy (CUP, 2010), Metaphysical Themes 1274-1671 (OUP, 2011), and After Certainty (OUP, 2017).