Magnifica Humanitas §77

⁷⁷ For the Christian community, social justice is a concrete way of following Jesus and remaining faithful to the Gospel. In the New Testament, Jesus proclaims the “good news to the poor” ( Lk 4:18) and identifies himself with the lowly, the sick, the imprisoned and strangers (cf. Mt 25:31-46). He thus teaches us that justice is born from, and fulfilled in, fraternity, because the way we approach and relate to the least among us becomes, in concrete terms, the measure of our relationship with God and with our brothers and sisters. Justice, however, concerns not only the behavior of individuals, but also the way in which the structures of society are conceived and organized. In this regard, the Second Vatican Council reminds us that every institution is called to serve the human person and his or her dignity. Social justice is, therefore, characterized by the capacity of a social, economic and political order to allow everyone — particularly the weakest — to live a truly dignified life, without leaving anyone behind.