Caritas in Veritate §53

⁵³ One of the deepest forms of poverty a person can experience is isolation. If we look closely at other kinds of poverty, including material forms, we see that they are born from isolation, from not being loved or from difficulties in being able to love. Poverty is often produced by a rejection of God's love, by man's basic and tragic tendency to close in on himself, thinking himself to be self-sufficient or merely an insignificant and ephemeral fact, a “stranger” in a random universe. Man is alienated when he is alone, when he is detached from reality, when he stops thinking and believing in a foundation . All of humanity is alienated when too much trust is placed in merely human projects, ideologies and false utopias . Today humanity appears much more interactive than in the past: this shared sense of being close to one another must be transformed into true communion. The development of peoples depends, above all, on a recognition that the human race is a single family working together in true communion, not simply a group of subjects who happen to live side by side . Pope Paul VI noted that “the world is in trouble because of the lack of thinking” . He was making an observation, but also expressing a wish: a new trajectory of thinking is needed in order to arrive at a better understanding of the implications of our being one family; interaction among the peoples of the world calls us to embark upon this new trajectory, so that integration can signify solidarity rather than marginalization. Thinking of this kind requires a deeper critical evaluation of the category of relation . This is a task that cannot be undertaken by the social sciences alone, insofar as the contribution of disciplines such as metaphysics and theology is needed if man's transcendent dignity is to be properly understood. As a spiritual being, the human creature is defined through interpersonal relations. The more authentically he or she lives these relations, the more his or her own personal identity matures. It is not by isolation that man establishes his worth, but by placing himself in relation with others and with God. Hence these relations take on fundamental importance. The same holds true for peoples as well. A metaphysical understanding of the relations between persons is therefore of great benefit for their development. In this regard, reason finds inspiration and direction in Christian revelation, according to which the human community does not absorb the individual, annihilating his autonomy, as happens in the various forms of totalitarianism, but rather values him all the more because the relation between individual and community is a relation between one totality and another . Just as a family does not submerge the identities of its individual members, just as the Church rejoices in each “new creation” (Gal 6:15; 2 Cor 5:17) incorporated by Baptism into her living Body, so too the unity of the human family does not submerge the identities of individuals, peoples and cultures, but makes them more transparent to each other and links them more closely in their legitimate diversity.