0 ENCYCLICAL OF POPE PIUS XII ON PRESCRIBING PUBLIC PRAYERS FOR SOCIAL AND WORLD PEACE TO THE PATRIARCHS, PRIMATES, ARCHBISHOPS, BISHIOPS, AND OTHER ORDINARIES IN PEACE AND COMMUNION WITH THE APOSTOLIC SEE Venerable Brethren, Greeting and Apostolic Blessing. Peace, longed for so hopefully, which should signify the tranquillity of order and serene liberty, even after the cruel experience of a long war, still hangs in uncertain balance, as everyone must note with sadness and alarm. Moreover, people's hearts and minds are kept in a state of anxious suspense, while in not a few nations - already laid waste by the world-conflict and its sorry aftermath of ruin and distress - the social classes are being incited to mutual hatred as their continuous rioting and agitation plainly threaten to subvert the very foundations of civil society.
Source: Optatissima Pax (Vatican.va)