2 But what applies to individual men applies equally to society - domestic alike and civil. Nature did not form society in order that man should seek in it his last end, but in order that in it and through it he should find suitable aids whereby to attain to his own perfection. If, then, a political government strives after external advantages only, and the achievement of a cultured and prosperous life; if, in administering public affairs, it is wont to put God aside, and show no solicitude for the upholding of moral law, it deflects woefully from its right course and from the injunctions of nature; nor should it be accounted as a society or a community of men, but only as the deceitful imitation or appearance of a society.
Source: Sapientiae Christianae (Vatican.va)