45 None of what has been said can be achieved without the collaboration of all - especially the international community - in the framework of a solidarity which includes everyone, beginning with the most neglected. But the developing nations themselves have the duty to practice solidarity among themselves and with the neediest countries of the world. It is desirable, for example, that nations of the some geographical area should establish forms of cooperation which will make them less dependent on more powerful producers; they should open their frontiers to the products of the area; they should examine how their products might complement one another; they should combine in order to set up those services which each one separately is incapable of providing; they should extend cooperation to the monetary and financial sector. Interdependence is already a reality in many of these countries. To acknowledge it, in such a way as to make it more operative, represents an alternative to excessive dependence on richer and more powerful nations, as part of the hoped-for development, without opposing anyone, but discovering and making best use of the country's own potential. The developing countries belonging to one geographical area, especially those included in the term "South," can and ought to set up new regional organizations inspired by criteria of equality, freedom and participation in the comity of nations- as is already happening with promising results. An essential condition for global solidarity is autonomy and free self-determination, also within associations such as those indicated. But at the same time solidarity demands a readiness to accept the sacrifices necessary for the good of the whole world community.
Source: Sollicitudo Rei Socialis (Vatican.va)