192 The only possible solution to this question is one which envisages the social and economic progress both of individuals and of the whole of human society, and which respects and promotes true human values. First consideration must obviously be given to those values which concern man's dignity generally, and the immense worth of each individual human life. Attention must then be turned to the need for worldwide co-operation among men, with a view to a fruitful and well-regulated interchange of useful knowledge, capital and manpower.
Source: Mater et Magistra (Vatican.va)