The new definition of the common good

Repeated here, and which finds support in various documents of the Church after Vatican 2: Why I am Not a Libertarian by Nathan Schlueter

The common good of the political association consists in the ensemble of conditions in which persons and associations can more easily flourish. These are nicely summarized in the Preamble to the Constitution of the United States: “to . . . 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.”

It seems to be implicitly tied to the modern conception of the (nation-)state, in which associations are not identical to the state. (An implicit recognition that the nation-state is too large?)