From Pope Benedict XVI’s encyclical Caritas in Veritate (2009):
In addition to its important link with the entirety of the Church’s social doctrine, Populorum Progressio is closely connected to the overall magisterium of Paul VI, especially his social magisterium. His was certainly a social teaching of great importance: he underlined the indispensable importance of the Gospel for building a society according to freedom and justice, in the ideal and historical perspective of a civilization animated by love. Paul VI clearly understood that the social question had become worldwide25 and he grasped the interconnection between the impetus towards the unification of humanity and the Christian ideal of a single family of peoples in solidarity and fraternity. In the notion of development, understood in human and Christian terms, he identified the heart of the Christian social message, and he proposed Christian charity as the principal force at the service of development. Motivated by the wish to make Christ’s love fully visible to contemporary men and women, Paul VI addressed important ethical questions robustly, without yielding to the cultural weaknesses of his time.
In his Apostolic Letter Octogesima Adveniens of 1971, Paul VI reflected on the meaning of politics, and the danger constituted by utopian and ideological visions that place its ethical and human dimensions in jeopardy. These are matters closely connected with development. Unfortunately the negative ideologies continue to flourish. Paul VI had already warned against the technocratic ideology so prevalent today,26 fully aware of the great danger of entrusting the entire process of development to technology alone, because in that way it would lack direction. Technology, viewed in itself, is ambivalent. If on the one hand, some today would be inclined to entrust the entire process of development to technology, on the other hand we are witnessing an upsurge of ideologies that deny in toto the very value of development, viewing it as radically anti-human and merely a source of degradation. This leads to a rejection, not only of the distorted and unjust way in which progress is sometimes directed, but also of scientific discoveries themselves, which, if well used, could serve as an opportunity of growth for all. The idea of a world without development indicates a lack of trust in man and in God. It is therefore a serious mistake to undervalue human capacity to exercise control over the deviations of development or to overlook the fact that man is constitutionally oriented towards “being more”. Idealizing technical progress, or contemplating the utopia of a return to humanity’s original natural state, are two contrasting ways of detaching progress from its moral evaluation and hence from our responsibility.
25 Cf. Encyclical Letter Populorum Progressio, 3: Acta Apostolicæ Sedis 59 (1967), 258.
26 Cf. ibid., 34: loc. cit., 274.
— Caritas in Veritate 13-14