The aim of this article is to argue that the principle of “publicity” constitutes a fundamental idea in Kant’s political thought. Publicity provides a central insight that binds together various strands of Kant’s political writings (on issues as diverse as the question of Enlightenment, the right of revolution, historical teleology, reflective judgment, cosmopolitan citizenship, democratic peace, and republican government), and moreover, it offers a much-needed cornerstone for a systematic exposition of his nonexistent political philosophy. Apart from some eminent examples, publicity (...) has been a rather neglected topic in the ever-expanding literature on Kant’s political ideas. Revisiting this notion will make us more attentive to his evocation of the “spirit of republicanism” over and above the letter of the law, and might prompt us to reconsider Kant’s reputation as a classical representative of liberal political thought. Indeed, it should inspire us to situate Kant’s appeal for the “public use of reason” in the vicinity of the republican ideal of political liberty. (shrink)