Populorum Progressio §84

⁸⁴ Government leaders, your task is to draw your communities into closer ties of solidarity with all men, and to convince them that they must accept the necessary taxes on their luxuries and their wasteful expenditures in order to promote the development of nations and the preservation of peace. Delegates to international organizations, it is largely your task to see to it that senseless arms races and dangerous power plays give way to mutual collaboration between nations, a collaboration that is friendly, peace oriented, and divested of self-interest, a collaboration that contributes greatly to the common development of mankind and allows the individual to find fulfillment.