Catechism of the Catholic Church §2832 — excerpt
As leaven in the dough, the newness of the kingdom should make the earth "rise" by the Spirit of Christ. This must be shown by the establishment of justice in personal and social, economic and international relations, without ever forgetting that there are no just structures without people who want to be just.
This translation is under copyright, so only the cited words are quoted here. Follow the link for the full text. Translation: English translation of the Catechism of the Catholic Church, 2nd ed. (Libreria Editrice Vaticana), as posted at vatican.va.
Also cites: AA 5