Recent progress in science and technology has had a profound influence on man's way of life. This progress is a spur to men all over the world to extend their collaboration and association with one another in these days when material resources, travel from one country to another, and technical information have so vastly increased. This has led to a phenomenal growth in relationships between individuals, families and intermediate associations belonging to the various nations, and between the public authorities of the various political communities. There is also a growing economic interdependence between States. National economies are gradually becoming so interdependent that a kind of world economy is being born from the simultaneous integration of the economies of individual States. And finally, each country's social progress, order, security and peace are necessarily linked with the social progress, order, security and peace of every other country.
From this it is clear that no State can fittingly pursue its own interests in isolation from the rest, nor, under such circumstances, can it develop itself as it should. The prosperity and progress of any State is in part consequence, and in part cause, of the prosperity and progress of all other States. Inadequacy of Modern States to Ensure Universal Common Good the
No era will ever succeed in destroying the unity of the human family, for it consists of men who are all equal by virtue of their natural dignity. Hence there will always be an imperative need—born of man's very nature—to promote in sufficient measure the universal common good; the good, that is, of the whole human family.
In the past rulers of States seem to have been able to make sufficient provision for the universal common good through the normal diplomatic channels, or by top-level meetings and discussions, treaties and agreements; by using, that is, the ways and means suggested by the natural law, the law of nations, or international law.
In our own day, however, mutual relationships between States have undergone a far reaching change. On the one hand, the universal common good gives rise to problems of the utmost gravity, complexity and urgency—especially as regards the preservation of the security and peace of the whole world. On the other hand, the rulers of individual nations, being all on an equal footing, largely fail in their efforts to achieve this, however much they multiply their meetings and their endeavors to discover more fitting instruments of justice. And this is no reflection on their sincerity and enterprise. It is merely that their authority is not sufficiently influential.
We are thus driven to the conclusion that the shape and structure of political life in the modern world, and the influence exercised by public authority in all the nations of the world are unequal to the task of promoting the common good of all peoples. Connection Between the Common Good and Political Authority
Now, if one considers carefully the inner significance of the common good on the one hand, and the nature and function of public authority on the other, one cannot fail to see that there is an intrinsic connection between them. Public authority, as the means of promoting the common good in civil society, is a postulate of the moral order. But the moral order likewise requires that this authority be effective in attaining its end. Hence the civil institutions in which such authority resides, becomes operative and promotes its ends, are endowed with a certain kind of structure and efficacy: a structure and efficacy which make such institutions capable of realizing the common good by ways and means adequate to the changing historical conditions.
Today the universal common good presents us with problems which are world-wide in their dimensions; problems, therefore, which cannot be solved except by a public authority with power, organization and means co-extensive with these problems, and with a world-wide sphere of activity. Consequently the moral order itself demands the establishment of some such general form of public authority. Public Authority Instituted by Common Consent and Not Imposed by Force
But this general authority equipped with world-wide power and adequate means for achieving the universal common good cannot be imposed by force. It must be set up with the consent of all nations. If its work is to be effective, it must operate with fairness, absolute impartiality, and with dedication to the common good of all peoples. The forcible imposition by the more powerful nations of a universal authority of this kind would inevitably arouse fears of its being used as an instrument to serve the interests of the few or to take the side of a single nation, and thus the influence and effectiveness of its activity would be undermined. For even though nations may differ widely in material progress and military strength, they are very sensitive as regards their juridical equality and the excellence of their own way of life. They are right, therefore, in their reluctance to submit to an authority imposed by force, established without their co-operation, or not accepted of their own accord. The Universal Common Good and Personal Rights