Robert Stalnaker received his PhD in philosophy at Princeton University in 1965, and subsequently taught philosophy over the next fifty years at Yale University, the University of Illinois at Urbana-Champaign, Cornell University, and MIT. He is the author of four books: Inquiry (MIT Press 1984), Our Knowledge of the Internal World (Oxford 2007), Mere Possibilities (Princeton 2012), and Context (Oxford 2015), as well as two previous collections of papers: Context and Content (Oxford 1999) and Ways a World Might Be (Oxford 2003). He is a member of the American Academy of Arts and Sciences, and a corresponding fellow of the British Academy.