Seven Years' War was a global conflict that happened between 1756 and 1763, affecting countries in several continents: Europe, the Americas, West Africa, and Asia. Some writers consider the end of this war as the beginning of the American Revolution. The word <em>American</em> started being used by the colonist during this period to refer to themselves.
If this had not been done, we would not have the government that we do. In fact, the Articles of Confederation described a different government in an equal level of detail, and those articles had also been ratified by the people. If the Articles had not been ratified, that government would not have existed. We wrote, and ratified the Constitution because we tried the Articles of Confederation and found that they did not work.
Without the constitution, we have nothing.
Without a Constitution of some kind you either have no government, or a crazy autocratic one.