65 Economic development must remain under man's determination and must not be left to the judgment of a few men or groups possessing too much economic power or of the political community alone or of certain more powerful nations. It is necessary, on the contrary, that at every level the largest possible number of people and, when it is a question of international relations, all nations have an active share in directing that development. There is need as well of the coordination and fitting and harmonious combination of the spontaneous efforts of individuals and of free groups with the undertakings of public authorities. Growth is not to be left solely to a kind of mechanical course of the economic activity of individuals, nor to the authority of government. For this reason, doctrines which obstruct the necessary reforms under the guise of a false liberty, and those which subordinate the basic rights of individual persons and groups to the collective organization of production must be shown to be erroneous. Citizens, on the other hand, should remember that it is their right and duty, which is also to be recognized by the civil authority, to contribute to the true progress of their own community according to their ability. Especially in underdeveloped areas, where all resources must urgently be employed, those who hold back their unproductive resources or who deprive their community of the material or spiritual aid that it needs—saving the personal right of migration—gravely endanger the common good.
Source: Gaudium et Spes (Vatican.va)