Catechism of the Catholic Church §1915 — excerpt
As far as possible citizens should take an active part in public life. the manner of this participation may vary from one country or culture to another.
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: GS 31 # 3