John Duns Scotus (d.1308), known as the 'subtle doctor' among medieval schoolmen, produced a formidable philosophical theology using and adapting an Aristotelian metaphysical framework. Critical of Thomas Aquinas' grand Summas, Scotus died before producing a final synthesis of his own. Indeed, his work, left in disarray for centuries, has only recently become available in an edited format. Contemporary metaphysics, taking up the problem of universals, treads on ground already well-worked by Scotus. Duns Scotus and the Problem of Universals shows how Scotus' treatment of the problem of...