NSC 68: United States Objectives and Programs for National Security
II. Fundamental Purpose of the United States
The fundamental purpose of the United States is laid down in the Preamble to the Constitution: ". . . 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." In essence, the fundamental purpose is to assure the integrity and vitality of our free society, which is founded upon the dignity and worth of the individual.
Three realities emerge as a consequence of this purpose: Our determination to maintain the essential elements of individual freedom, as set forth in the Constitution and Bill of Rights; our determination to create conditions under which our free and democratic system can live and prosper; and our determination to fight if necessary to defend our way of life, for which as in the Declaration of Independence, "with a firm reliance on the protection of Divine Providence, we mutually pledge to each other our lives, our Fortunes, and our sacred Honor."