In this paper I provide an interpretation of Kant’s conception of free speech. Free speech is understood as the kind of speech that is constitutive of interaction respectful of everybody’s right to freedom, and it requires what we with John Rawls may call ‘public reason’. Public reason so understood refers to how the public authority must reason in order to properly specify the political relation between citizens. My main aim is to give us some reasons for taking a renewed interest (...) in Kant’s conception of free speech, including his account public reason. Kant’s position provides resources for dealing with many of the legal and political problems we currently struggle to analyze under this heading, such as the proper distinction between the sphere of justice and the sphere of ethics, hate speech, freedom of speech, defamation, and the public guarantee of reliable media and universal education. (shrink)