Pope John Paul II
Centesimus Annus §38
Centesimus Annus: On the Hundredth Anniversary of Rerum Novarum
38 In addition to the irrational destruction of the natural environment, we must also mention the more serious destruction of the human environment, something which is by no means receiving the attention it deserves. Although people are rightly worried — though much less than they should be — about preserving the natural habitats of the various animal species threatened with extinction, because they realize that each of these species makes its particular contribution to the balance of nature in general, too little effort is made to safeguard the moral conditions for an authentic "human ecology". Not only has God given the earth to man, who must use it with respect for the original good purpose for which it was given to him, but man too is God's gift to man. He must therefore respect the natural and moral structure with which he has been endowed. In this context, mention should be made of the serious problems of modern urbanization, of the need for urban planning which is concerned with how people are to live, and of the attention which should be given to a "social ecology" of work. Man receives from God his essential dignity and with it the capacity to transcend every social order so as to move towards truth and goodness. But he is also conditioned by the social structure in which he lives, by the education he has received and by his environment. These elements can either help or hinder his living in accordance with the truth. The decisions which create a human environment can give rise to specific structures of sin which impede the full realization of those who are in any way oppressed by them. To destroy such structures and replace them with more authentic forms of living in community is a task which demands courage and patience.
Source: Centesimus Annus (Vatican.va)