Pope John Paul II
Sollicitudo Rei Socialis §11
Sollicitudo Rei Socialis: On Social Concern
11 In its own time the fundamental teaching of the Encyclical Populorum Progressio received great acclaim for its novel character. The social context in which we live today cannot be said to be completely identical to that of twenty years ago. For this reason, I now wish to conduct a brief review of some of the characteristics of today's world, in order to develop the teaching of Paul VI's Encyclical, once again from the point of view of the "development of peoples."
Source: Sollicitudo Rei Socialis (Vatican.va)