Ad Petri Cathedram §132

¹³² We know that many of Our children who live in want or great misfortune often protest that the social teachings of Christianity have not yet been fully put into practice. Private citizens, and more particularly public officials, must take steps to see that the Christian social doctrine which Our predecessors have often clearly and wisely taught and decreed, and which we have confirmed, is really given full effect. (65) Although this will have to be done gradually, no time should be wasted.