41 The poorer nations can never be too much on guard against the temptation posed by the wealthier nations. For these nations, with their favorable results from a highly technical and culturally developed civilization, provide an example of work and diligence with temporal prosperity the main pursuit. Not that temporal prosperity of itself precludes the activity of the human spirit. Indeed, with it, "the human spirit, being less subjected to material things, can be more easily drawn to the worship and contemplation of the Creator." (42) On the other hand, "modern civilization itself often complicates the approach to God, not for any essential reason, but because it is so much engrossed in worldly affairs . " (43) The developing nations must choose wisely from among the things that are offered to them. They must test and reject false values that would tarnish a truly human way of life, while accepting noble and useful values in order to develop them in their own distinctive way, along with their own indigenous heritage.
Source: Populorum Progressio (Vatican.va)