Career
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.
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.
His specialties include ancient philosophy (Plato, Aristotle, Stoicism and neo-Platonism), medieval philosophy (Western and Islamic).