Answer:
The principles laid out in the US Constitution including the terms unalienable rights, establish justice, insurance domestic tranquility, promote the general welfare, and secure freedoms of liberty appear in the Preamble.
The preamble to the United States Constitution consists of a single sentence that introduces the document and explains its function. After the American Declaration of Independence in 1776, the political leaders of the then thirteen states - New Hampshire, New York, Rhode Island, Pennsylvania, Massachusetts, Connecticut, New Jersey, Delaware, Maryland, Virginia, Georgia, North Carolina and South Carolina - felt that their Articles of Confederation were no longer adequate as a constitution. The new constitution, recorded in 1787, was preceded by this preamble.
"We the People of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defence, 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".
Technically, the Preamble of the Constitution of the United States does not give powers to entities within the federal government, however, the Supreme Court has cited the preamble in consideration of the history, intent and meaning of several clauses that follows in the Constitution.
The phrase "WE, THE PEOPLE" is of singular importance because it stipulates that the power and authority of the federal government of the United States of America does not come from the various states or the people of the various states, but from an entity that is identified as the People of the United States of America, with the Constitution serving as a compact or contract between the People of the United States of America, the various states, and the new entity: the federal government of the United States of America. The importance of this language lies in the idea that the government does not derive its power only from the various states. This became a major contention issue during the Nullification Crisis and the Civil War.
