The document outlines the goals and principles of the US Constitution. The six main goals stated in the Preamble are to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defense, promote the general Welfare, and secure the Blessings of Liberty. The five key principles that guide the US government are Popular Sovereignty, Rule of Law, Separation of Powers, Checks and Balances, and Federalism.