51 All human activity takes place within a culture and interacts with culture. For an adequate formation of a culture, the involvement of the whole man is required, whereby he exercises his creativity, intelligence, and knowledge of the world and of people. Furthermore, he displays his capacity for self-control, personal sacrifice, solidarity and readiness to promote the common good. Thus the first and most important task is accomplished within man's heart. The way in which he is involved in building his own future depends on the understanding he has of himself and of his own destiny. It is on this level that the Church's specific and decisive contribution to true culture is to be found. The Church promotes those aspects of human behaviour which favour a true culture of peace, as opposed to models in which the individual is lost in the crowd, in which the role of his initiative and freedom is neglected, and in which his greatness is posited in the arts of conflict and war. The Church renders this service to human society by preaching the truth about the creation of the world, which God has placed in human hands so that people may make it fruitful and more perfect through their work; and by preaching the truth about the Redemption, whereby the Son of God has saved mankind and at the same time has united all people, making them responsible for one another. Sacred Scripture continually speaks to us of an active commitment to our neighbour and demands of us a shared responsibility for all of humanity. This duty is not limited to one's own family, nation or State, but extends progressively to all mankind, since no one can consider himself extraneous or indifferent to the lot of another member of the human family. No one can say that he is not responsible for the well-being of his brother or sister (cf. Gen 4:9; Lk 10:29-37; Mt 25:31-46). Attentive and pressing concern for one's neighbour in a moment of need — made easier today because of the new means of communication which have brought people closer together — is especially important with regard to in the search for ways to resolve international conflicts other than by war. It is not hard to see that the terrifying power of the means of destruction — to which even medium and small-sized countries have access — and the ever closer links between the peoples of the whole world make it very difficult or practically impossible to limit the consequences of a conflict.
Source: Centesimus Annus (Vatican.va)