27 On this subject we need but recall for one moment the examples recorded in history. Of these facts there cannot be any shadow of doubt: for instance, that civil society was renovated in every part by Christian institutions; that in the strength of that renewal the human race was lifted up to better things-nay, that it was brought back from death to life, and to so excellent a life that nothing more perfect had been known before, or will come to be known in the ages that have yet to be. Of this beneficent transformation Jesus Christ was at once the first cause and the final end; as from Him all came, so to Him was all to be brought back. For, when the human race, by the light of the Gospel message, came to know the grand mystery of the Incarnation of the Word and the redemption of man, at once the life of Jesus Christ, God and Man, pervaded every race and nation, and interpenetrated them with His faith, His precepts, and His laws. And if human society is to be healed now, in no other way can it be healed save by a return to Christian life and Christian institutions. When a society is perishing, the wholesome advice to give to those who would restore it is to call it to the principles from which it sprang; for the purpose and perfection of an association is to aim at and to attain that for which it is formed, and its efforts should be put in motion and inspired by the end and object which originally gave it being. Hence, to fall away from its primal constitution implies disease; to go back to it, recovery. And this may be asserted with utmost truth both of the whole body of the commonwealth and of that class of its citizens-by far the great majority - who get their living by their labor.
Source: Rerum Novarum (Vatican.va)