1. Although the war seems unavoidable when we look back on it, it is likely that Great Britain had the chance to diffuse the situation. Before the war started, the colonists had made complaints and requests to the British government repeatedly. These were often ignored, and the colonists considered the outcome as evidence of the fact that the King did not care about his colonial subjects. If the King had listened more carefully, and agreed to compromise, the war might have been avoided.
2. The American Revolution was an important source of inspiration for the French Revolution. The French Revolution, in turn, inspired many European governments to liberalize and slowly democratize their monarchies. Without the revolution in the American colonies, absolutism would have probably lasted longer. Moreover, the independence movements in the rest of America would probably have occurred much later as well.