The Order of Charity

Daniel Larison writes:

Freedom presupposes a moral order that entails other, prior obligations between kin and between fellow citizens. Within a polity, fellow citizens have more obligations to one another than they have to non-citizens. Even if the net benefits of a policy accrue to many citizens and non-citizens, but come at the expense of fellow citizens, it is very likely unjust and contrary to the obligations that members of a polity have towards one another. For the success of any polity in providing for the welfare of its members, there must be a certain degree of solidarity, and it is those things leading towards social fragmentation and disunity that need to be justified. Incidentally, on this point Christian social thought has much to say and has ample room for a solidaristic, patriotic nationalism.

The order of charity, and the "particularity" of our obligations to others, is something ignored by Mohists and certain liberals, especially Catholic liberals. I wonder by what pathway Mr. Larison has acquired this teaching of paleoconservatism. Conservative texts? Christian texts? Both? It is certainly a part of Thomistic moral theology, and I would go so far as to claim that it is part of the Tradition as well. I do not know to what text Orthodox Christians would refer.