Catechism of the Catholic Church §1920 — excerpt
"The political community and public authority are based on human nature and therefore . . belong to an order established by God" (GS 74 # 3).
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.