Catechism of the Catholic Church §2209 — excerpt
The family must be helped and defended by appropriate social measures. Where families cannot fulfill their responsibilities, other social bodies have the duty of helping them and of supporting the institution of the family.
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.