Pope John XXIII
Mater et Magistra §174
Mater et Magistra: On Christianity and Social Progress
174 If this can be achieved, then a precious contribution will have been made to the formation of a world community, in which each individual nation, conscious of its rights and duties, can work on terms of equality with the rest for the attainment of universal prosperity.
Source: Mater et Magistra (Vatican.va)