In this landmark encyclical released on the 135th anniversary of Rerum Novarum, Pope Leo XIV addresses the most urgent and transformative challenge of our era: the rise of artificial intelligence and the digital revolution. With prophetic insight and deep theological wisdom, the Holy Father calls humanity to a pivotal choice—to build a new Tower of Babel driven by technocratic power and self-sufficiency, or to rebuild the walls of Jerusalem through shared responsibility, solidarity, and love. Magnifica Humanitas (The Grandeur of Humanity) offers a comprehensive moral and spiritual framework for navigating the age of AI. Drawing on the rich tradition of Catholic social doctrine—from Leo XIII to Francis—the encyclical explores the foundations of human dignity, the common good, subsidiarity, solidarity, and social justice as essential principles for discerning the ethical use of emerging technologies.