I was about to start another thread on the concept of "Commonwealth" - and probably still will - but it is relevant here because the concept is central to the creation of the United States itself (indeed, four states still refer to themselves as "Commonwealths.") Commonwealth (United States). Indeed, the Constitution itself is clearly based upon the concept of "Res publica," the "common weal."
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 authority of the State thus draws its power from the will of the governed to "establish justice"; "insure domestic tranquility"; "provide for the common defense"; "promote the general welfare"; and secure the blessings of liberty "for ourselves and our posterity." The structure then follows from that principle "e pluribus unum" - from the many, one. Libertarianism is, quite directly, very "un"-constitutional, as it places the interests of individuals over that of the collective whole. Ooops... there's that "collective" word again....
A well reasoned argument is like a diamond: impervious to corruption and crystal clear - and infinitely rarer.

Here, as elsewhere, people are outraged at what feels like a rigged game -- an economy that won't respond, a democracy that won't listen, and a financial sector that holds all the cards. - Robert Reich