Cover it, Trump.
Historically what you see in a society that is breaking down isn’t one black swan event. You are taught about those events because they make good topics in history class, but real wrol is slower. What happens is the “right to exercise violence” is questioned and tested, and in a failed state, will ultimately shift to unknown third parties.
This is happening right now in Baltimore. No one respects the governments’ monopoly on violence anymore. Baltimore is WROL. The question is if it will be permanent, which I doubt. In a permanent scenario, the third parties would be gangs. These groups will step up to fill the power vaccuum created by a demonstratably weak police force. In some cases the third party will exercise violence in order to prove that they are the new dominant force in the region. Taliban, ISIS, 1800’s China are all examples of this.
TLDR When you see an ineffectual police force being ignored, that is a bad sign. When the police are being violently swept aside by bands of individuals, that is it. That is why these riots lately are worrying. Every riot seems to become more violent towards the establishment.