Immanuel Kant is, famously, not only the major philosopher of European enlightenment, but also one of the first philosophers to develop a philosophical theory of "human races". How do these two sides of Kant relate to each other? What is the significance of race in Kant's philosophy? In this article, we aim to discuss these questions by taking (1st) a close look into the conceptual and philosophical presuppositions underlying Kant's understanding of race; relating them (2nd) to the concept of teleology as developed by Kant in the Critique of Judgement and to the idea of natural history that can be derived from there. In the last two chapters (3rd and 4th), we intertwine both perspectives in such a way that, on the one hand, we can determine the philosophical significance of race for Kant, and, on the other hand, show how a race-sensible perspective gives new and critical insight into Kant's concept of reason.