Pope John XXIII
Pacem in Terris §118
Pacem in Terris: On Establishing Universal Peace in Truth, Justice, Charity, and Liberty
118 In their deliberations together, let men of outstanding wisdom and influence give serious thought to the problem of achieving a more human adjustment of relations between States throughout the world. It must be an adjustment that is based on mutual trust, sincerity in negotiation, and the faithful fulfilment of obligations assumed. Every aspect of the problem must be examined, so that eventually there may emerge some point of agreement from which to initiate treaties which are sincere, lasting, and beneficial in their effects.
Source: Pacem in Terris (Vatican.va)