From Pope Benedict XVI’s encyclical Caritas in Veritate (2009):
The publication of Populorum Progressio occurred immediately after the conclusion of the Second Vatican Ecumenical Council, and in its opening paragraphs it clearly indicates its close connection with the Council.14 Twenty years later, in Sollicitudo Rei Socialis, John Paul II, in his turn, emphasized the earlier Encyclical’s fruitful relationship with the Council, and especially with the Pastoral Constitution Gaudium et Spes.15 I too wish to recall here the importance of the Second Vatican Council for Paul VI’s Encyclical and for the whole of the subsequent social Magisterium of the Popes. The Council probed more deeply what had always belonged to the truth of the faith, namely that the Church, being at God’s service, is at the service of the world in terms of love and truth. Paul VI set out from this vision in order to convey two important truths. The first is that the whole Church, in all her being and acting — when she proclaims, when she celebrates, when she performs works of charity — is engaged in promoting integral human development. She has a public role over and above her charitable and educational activities: all the energy she brings to the advancement of humanity and of universal fraternity is manifested when she is able to operate in a climate of freedom. In not a few cases, that freedom is impeded by prohibitions and persecutions, or it is limited when the Church’s public presence is reduced to her charitable activities alone. The second truth is that authentic human development concerns the whole of the person in every single dimension.16 Without the perspective of eternal life, human progress in this world is denied breathing-space. Enclosed within history, it runs the risk of being reduced to the mere accumulation of wealth; humanity thus loses the courage to be at the service of higher goods, at the service of the great and disinterested initiatives called forth by universal charity. Man does not develop through his own powers, nor can development simply be handed to him. In the course of history, it was often maintained that the creation of institutions was sufficient to guarantee the fulfilment of humanity’s right to development. Unfortunately, too much confidence was placed in those institutions, as if they were able to deliver the desired objective automatically. In reality, institutions by themselves are not enough, because integral human development is primarily a vocation, and therefore it involves a free assumption of responsibility in solidarity on the part of everyone. Moreover, such development requires a transcendent vision of the person, it needs God: without him, development is either denied, or entrusted exclusively to man, who falls into the trap of thinking he can bring about his own salvation, and ends up promoting a dehumanized form of development. Only through an encounter with God are we able to see in the other something more than just another creature,17 to recognize the divine image in the other, thus truly coming to discover him or her and to mature in a love that “becomes concern and care for the other.”18
14 Cf. nos. 3-5: Acta Apostolicæ Sedis [AAS] 59 (1967), 258-260.
15 Cf. John Paul II, Encyclical Letter Sollicitudo Rei Socialis (30 December 1987), 6-7: AAS 80 (1988), 517-519.
16 Cf. Paul VI, Encyclical Letter Populorum Progressio, 14: loc. cit., 264.
17 Cf. Benedict XVI, Encyclical Letter Deus Caritas Est (25 December 2005), 18: AAS 98 (2006), 232.
18 Ibid., 6: loc cit., 222.
— Caritas in Veritate 11