One of the major themes of our textbook is the theme of Revolutions. Not only in the textbook, but the theme of revolution is as old as humanity itself. We can see that it is an inescapable part of the human societies from the time the pre historic times to the present day. It is a sign of discontent of the masses against the ruling class. The Mongol invasion of China, then the counterrevolution of the Manchus, which was toppled by the spiritual prophet revolutionary. America was first under the Spanish and Portuguese control, then the British took over and then the American Revolution took place.