Catechism of the Catholic Church §2329 — excerpt
"The arms race is one of the greatest curses on the human race and the harm it inflicts on the poor is more than can be endured" (GS 81 # 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.