In his 1972 World Day of Peace Message, in which Pope Paul VI so famously said, "if you want peace, work for justice," he also wrote, "We believe that the idea of Peace still is, and still must be, dominant in human affairs, and that it becomes all the more urgent whenever and wherever it is contradicted by opposite ideas or deeds. It is a necessary idea, an imperative idea, an inspiring idea. It polarizes human aspirations, endeavours and hopes. Its nature is that of an aim, and as such it is at the base and at the goal of our activities, be they individual or collective." Reflections on previous World Day of Peace Messages by the U.S. bishops can be found on the USCCB World Day of Peace page.

The USCCB also offers resources on the topics of Arms Trade; Conscience, War and Peace; Landmines; Nuclear Weapons; and September 11.