What is a revolution? – LEON TROTSKY

The most indubitable feature of a revolution is the direct interference of the masses in historical events. In ordinary times the state, be it monarchical or democratic, elevates itself above the nation, and history is made by specialists in that line of business – kings, ministers, bureaucrats, parliamentarians, journalists. But at those crucial moments when the old order becomes no longer endurable to the masses, they break over the barriers excluding them from the political arena, sweep aside their traditional representatives, and create by their own interference the initial groundwork for a new régime. Whether this is good or bad we leave to the judgement of moralists. We ourselves will take the facts as they are given by the objective course of development. The history of a revolution is for us first of all a history of the forcible entrance of the masses into the realm of rulership over their own destiny.

From The History of the Russian Revolution