Stephen Menn (born 1964) is Professor of Philosophy at McGill University and, between 2011 and 2015, was Professor of Ancient and Contemporary Philosophy at Humboldt University of Berlin and the author of Descartes and Augustine about the origin of Descartes' cogito. His specialties include ancient philosophy (Plato, Aristotle, Stoicism and neo-Platonism), medieval philosophy (Western and Islamic). He is also a mathematician, holding a doctorate in Mathematics from Johns Hopkins University in 1985 and one in Philosophy from University of Chicago in 1989.