The Shift from Public Squares to Private Walled Gardens
Online conversation increasingly happens on platforms governed by private rules.
The Mechanism: Social media platforms host public-facing conversations while setting private terms for moderation, ranking, access, and data. Their policies and technical systems shape what participants can see and say.
The Philosophical Pivot: A public square implies shared civic space, but a commercial platform can change its rules without the same obligations as a public institution. People gather there because their communities are already there.
The Horizon: Interoperability, public-interest platforms, and transparent governance may create alternatives. But private spaces can also enable expression and community that traditional public institutions have neglected.
The issue is not that all speech belongs everywhere; moderation can protect people. The question is who makes the rules, how decisions can be appealed, and whether users have meaningful alternatives.
A space feels public when people depend on it, even if they do not govern it.
A plaza owned by a company is public only until its terms change.
Which conversations in my community depend on a private platform, and what happens if its rules or access change?