This document discusses the transformation of public space with the rise of social media. It begins by reviewing classic concepts of the public sphere from thinkers like Habermas, Dewey, and Kant. It then acknowledges critiques of these ideals and proposes updated concepts must focus on inclusion, visibility, and spatial aspects across different media settings. The document examines how social media can democratize by amplifying visibility but also risks "siloization" as people tend to confirm existing views. It contrasts the potential for "smooth public spheres" online with efforts by governments, corporations, and institutions to impose "striated" controls. In the end, it argues the key issues are whether a coherent public sphere remains possible across fragmented media and the