6 Whatever the genius of man has produced that is beautiful and good and holy, all of this can be practically annihilated. But if a war, especially today, appears to every honest observer as something terrifying and deadly, there is yet reason to hope - through the efforts of all people and particularly of their rulers - that the dark and menacing clouds which presently cause such trepidation may pass away, and that true peace may finally reign among nations.
Source: Summi Maeroris (Vatican.va)