The police and intelligence are well paid to keep an eye on all kinds of signals. Unless the situation reaches a point they cant pay the cops any voilence will be shut down fast, because over time they have become quite good at it. Just like we have become good at running gigantic boilers without them exploding. Even poor states are good at it. Because anyone running a farm, factory, depending on banks, telcos, ports, power grid etc are all very dependent on the state to keep the lights on. More efficent they get the more dependent they are on external structures staying in tact to stay afloat.

The world today is a much more complicated place, full of interdependcies(as covid showed us), than what it was when revolutions were seen as the solution to anything.

So Organizing and Voting still remains the easier way to cause change as tempratures rise. Thats the control and feedback mech.