The U.S. Constitution is a revolutionary document, based on an existing working system from British Parliament. The Philadelphia Convention that resulted in the ratification of the Constitution, began out of necessity in an effort to improve the Articles of Confederation. The Constitution’s main principles include the prospect of federalism, the separation of powers, and the rule of law; the Constitution stands as a blueprint for both a democratic and a federal republic, securing and assuring the individual sovereignty of the people against monarchal tyranny.