21 The condition of things at present proclaims, and proclaims vehemently, that there is need for a union of brave minds with all the resources they can command. The harvest of misery is before our eyes, and the dreadful projects of the most disastrous national upheavals are threatening us from the growing power of the socialistic movement. They have insidiously worked their way into the very heart of the community, and in the darkness of their secret gatherings, and in the open light of day, in their writings and their harangues, they are urging the masses onward to sedition; they fling aside religious discipline; they scorn duties; they clamor only for rights; they are working incessantly on the multitudes of the needy which daily grow greater, and which, because of their poverty are easily deluded and led into error. It is equally the concern of the State and of religion, and all good men should deem it a sacred duty to preserve and guard both in the honor which is their due.
Source: Graves de Communi Re (Vatican.va)