Newhauser's work on the genre of the treatise on vices and virtues is, in effect, an attempt to resolve a paradox of modern scholarship. We have witnessed, in the past thirty years in particular, a rapid growth in the number of studies on the vices and virtues in the Middle Ages and on individual vices or virtues or on works containing information about them - and nevertheless there is almost no scholarship on the tractatus de vitiis et virtutibus...