It is because a universal public square cannot be a community that the parameters of the online speech debate are stuck. The conflict between the “marketplace of ideas” framework and the “communal norms” framework seems irresolvable because it is irresolvable. At least, this is so for the platforms we have now, which are an experiment with no obvious historical precedent: forums for discourse and information discovery that are not communities, or at best are failed communities. It is only in a forum that is a community that these two viewpoints can be reconciled, even mutually sustaining.
– Why Speech Platforms Can Never Escape Politics