This volume aims to make a significant contribution to the debate surrounding the renaissance of Kant studies in the last few decades, with a particular emphasis upon some ‘problems of reason’. Like no other, Kant covered the entire breadth of the modern debate concerning the concept of reason and its forms. Accordingly, despite the range of topics this volume inevitably deals with, Immanuel Kant remains the common point of reference for all contributions. The volume is divided into two sections. The first section is dedicated to Kant’s philosophy in particular and its relationship with the philosophies of Kant’s predecessors. From the perspective of the history of philosophy, interpretations of the significance of different philosophical traditions concerning Kant’s thought will be given, and of the relationship of Kant’s thought to the problems of reason with which Kant and his predecessors dealt. The second section is dedicated to the legacy of Kant’s philosophy. The relevance of the concept of rationality for the genesis and systematics of post-Kantian ideas of rationality will be discussed, and the potential of Kant’s critical philosophy – for contemporary thought as well – will be examined.