Pope John XXIII
Pacem in Terris §123
The Evolution of Economically Under-developed Countries
123 Again and again We must insist on the need for helping these peoples in a way which guarantees to them the preservation of their own freedom. They must be conscious that they are themselves playing the major role in their economic and social development; that they are themselves to shoulder the main burden of it.
Source: Pacem in Terris (Vatican.va)