Thanks to chaos and quantum, reality is driven by probabilities. There is no certitude, shit happens, always, particularly relating to revolutions as one can never predict how they start. Just ask the French about this and now, possibly Iran, a nation seemed poised to finally end the shackles of the ayatollahs thanks to an overstep of the morality police who tragically ended the life of a young woman for wearing inappropriate clothing.
Addendum. The Morality police are gone.