We the People of the United States, in Order 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 to ourselves and our Posterity, do ordain and establish this Constitution for the United States of America.
The Preamble sets out the origin, scope and purpose of the Constitution. Its origin and authority is in “We, the people of the United States”. This echoes the Declaration of Independence. “One people” dissolved their connection with another, and assumed among the powers of the earth, a sovereign nation-state. The scope of the Constitution is twofold. First, “to form a more perfect Union” than had previously existed in the “perpetual Union” of the Articles of Confederation. Second, to “secure the blessings of liberty”, which were to be enjoyed by not only the first generation, but for all who came after, “our posterity”.
This is an itemized social contract of democratic philosophy. It details how the more perfect union was to be carried out between the national government and the people. The people are to be provided (a) justice, (b) civil peace, (c) common defense, (d) those things of a general welfare that they could not provide themselves, and (e) freedom. A government of “liberty and union, now and forever”, unfolds when “We” begin and establish this Constitution.