Abstract
Contemporary forms of Kantian constitutivism generally begin with a conception of agency on which the constitutive aim of agency is some form of autonomy or self-unification. This chapter argues for a re-orientation of the Kantian constitutivist project towards views that begin with a conception of rationality on which both theoretical and practical rationality aim at forms of understanding. In a slogan, then, understanding-first as opposed to autonomy-first constitutivism. Such a view gives the constitutivist new resources for explaining many classes of reasons, while also offering a new way of understanding the unity of theoretical and practical reason. The chapter concludes by arguing that the resulting view is best understood, not so much as an alternative to autonomy-first constitutivism, but as a complement to it.