Act Local
In Chapter One of Magnifica Humanitas, Pope Leo XIV sets out to show that the Church's Social Doctrine is not a fixed rulebook but a living, dynamic tradition — one that has always responded to the res novae, the 'new things' of each era, in the light of the Gospel. He situates artificial intelligence within this same tradition, presenting it not as just another issue to be managed but as a development that challenges the very categories of Catholic social teaching. Before turning to AI itself, he clarifies how the Church relates to the world: she walks alongside humanity rather than ruling over it, honours the rightful autonomy of earthly realities, distinguishes her mission from that of the State, and engages in genuine dialogue with science and human knowledge. He insists that truth is 'a gift to be shared, not a possession to be guarded,' and that Social Doctrine is best understood as a process of shared discernment rather than a set of imposed answers. Pope Leo then traces this discernment across more than a century — from Leo XIII's Rerum Novarum (1891) and its defence of workers' dignity, through Pius XI's principle of subsidiarity, Pius XII's appeal to international law, John XXIII's framework of human rights, Vatican II's vision of a Church close to the world, Paul VI's claim that 'development is the new name for peace,' John Paul II's reflections on work and solidarity, Benedict XVI's 'charity in truth,' and Francis's integral ecology and call to universal fraternity. Together, he argues, these popes hand on a single inheritance — the dignity of the person, the value of work, the universal destination of goods, solidarity, subsidiarity, care for creation, and peace — and it is this living inheritance that the Church now carries into her conversation with the age of artificial intelligence.
07 June 2026 · Pope Leo