Btw, it's very rare (if ever) that a revolution is started by the poor who've had enough. The French Revolution certainly wasn't. Urbanization developed the economy which created a bourgeoisie deprived of the privileges reserved for the noble elite to which they could not ascend to. They fomented the resentment by speaking of the injustices of the system, the plight of the downtrodden, and easily convinced the already angry majority to revolt.
The basis of all system altering social swells from the Right and the Left is idealism (usually driven by one man), the belief that perfection is attainable and around the corner, be it from Robespierre, Lenin, Hitler, Mussolini or Jesus.