The emergence of new platforms for public communication, public deliberation, and public action presents new possibilities for forming, organizing, and mobilizing public bodies, which invite philosophical reflection concerning the standards we currently look to for coordinating public movements and for evaluating their effects. Developing a broad understanding of public philosophy, this article begins with the view of philosophy and intellectual freedom articulated in Kant’s publicly oriented writings. We then focus on the power of philosophical discourse to form and further articulate public bodies. Drawing on Dewey’s work, we discuss the role of philosophical discourse in the articulation of publics into self-regulated, sovereign entities. We conclude with an account of how publishing itself might come to play an important role in the practice of public philosophy in a digital age.