The US Constitution (Part 2 of 4)

Preamble. The preamble to the Constitution serves as an introductory statement of the document's fundamental purposes and guiding principles. It neither assigns powers to the federal government, nor does it place specific limitations on government action. Rather, it 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".