The system has to burn and be rebuilt. The actions of a few do not represent the many. Humanity, for worse or better must come to represent itself again. History has plenty of information about how and why revolutions are formed, and in my observations it either takes an act of attentive artists pulling the people together, or poverty.
Myself, I opt for poverty. I'm no artist, so I seek to drain everything I can from the economy and welfare systems. I don't care which of you understand this logic, as I'm aware the majority are merely interested in social-gratification.
Fire away, as I'm aware none of you are actually interested in my points here and merely seek to have better positions of attack.
Edit in response to edit:
Examples: American and French revolutions. Various Communist revolutions. Various violent and non-violent conflicts leading to constitutional monarchy and then democracy in England (with similar situations in the rest of Europe). Various revolutions against colonialism.
However, by your own definition of the problem, none of these have been very successful over the long term.