84 In view of the increasingly close ties of mutual dependence today between all the inhabitants and peoples of the earth, the apt pursuit and efficacious attainment of the universal common good now require of the community of nations that it organize itself in a manner suited to its present responsibilities, especially toward the many parts of the world which are still suffering from unbearable want. To reach this goal, organizations of the international community, for their part, must make provision for men's different needs, both in the fields of social life—such as food supplies, health, education, labor and also in certain special circumstances which can crop up here and there, e.g., the need to promote the general improvement of developing countries, or to alleviate the distressing conditions in which refugees dispersed throughout the world find themselves, or also to assist migrants and their families. Already existing international and regional organizations are certainly well-deserving of the human race. These are the first efforts at laying the foundations on an international level for a community of all men to work for the solution to the serious problems of our times, to encourage progress everywhere, and to obviate wars of whatever kind. In all of these activities the Church takes joy in the spirit of true brotherhood flourishing between Christians and non-Christians as it strives to make ever more strenuous efforts to relieve abundant misery.
Source: Gaudium et Spes (Vatican.va)