 Stalin shutting down printing presses or radio stations in Soviet Russia in the 1920s and 30s because you don't know what's happening. You don't know if you've been shadow banned. You don't know if you have taken your followers or your voice. You don't know if it's been de-emphasized. The people you think you're reaching that aren't receiving your voice may not know that they're not receiving your voice anymore. And so it is much more pernicious than it was decades ago, centuries ago.