13 In the present day, however, individual and group effort within these countries is no longer enough. The world situation requires the concerted effort of everyone, a thorough examination of every facet of the problem—social, economic, cultural and spiritual. The Church, which has long experience in human affairs and has no desire to be involved in the political activities of any nation, "seeks but one goal: to carry forward the work of Christ under the lead of the befriending Spirit. And Christ entered this world to give witness to the truth; to save, not to judge; to serve, not to be served.'' (12) Founded to build the kingdom of heaven on earth rather than to acquire temporal power, the Church openly avows that the two powers—Church and State—are distinct from one another; that each is supreme in its own sphere of competency. (13) But since the Church does dwell among men, she has the duty "of scrutinizing the signs of the times and of interpreting them in the light of the Gospel." (14) Sharing the noblest aspirations of men and suffering when she sees these aspirations not satisfied, she wishes to help them attain their full realization. So she offers man her distinctive contribution: a global perspective on man and human realities.
Source: Populorum Progressio (Vatican.va)