48 The duty of promoting human solidarity also falls upon the shoulders of nations: "It is a very important duty of the advanced nations to help the developing nations . . ." (53) This conciliar teaching must be implemented. While it is proper that a nation be the first to enjoy the God-given fruits of its own labor, no nation may dare to hoard its riches for its own use alone. Each and every nation must produce more and better goods and products, so that all its citizens may live truly human lives and so that it may contribute to the common development of the human race. Considering the mounting indigence of less developed countries, it is only fitting that a prosperous nation set aside some of the goods it has produced in order to alleviate their needs; and that it train educators, engineers, technicians and scholars who will contribute their knowledge and their skill to these less fortunate countries.
Source: Populorum Progressio (Vatican.va)