In October 1962, the world held its collective breath. For thirteen agonising days, the United States and the Soviet Union stood eyeball-to-eyeball, their fingers hovering over nuclear triggers. The Cuban Missile Crisis had brought humanity to the absolute precipice of thermonuclear annihilation. This was not merely a political standoff; it was the terrifying zenith of the Third Industrial Revolution—an era where human scientific genius and industrial mass production had successfully automated the mechanics of global extinction. Strategic Air Command was put on DEFCON 2, and millions of families watched their televisions in terror, wondering if the dawn would bring the end of civilisation.
It was against this apocalyptic backdrop, with the literal survival of the human race hanging in the balance, that an aging, ailing Pope John XXIII decided to intervene. Behind the scenes, the Pope acted as a critical diplomatic bridge, exchanging secret, urgent messages with both John F. Kennedy and Nikita Khrushchev, pleading for restraint. The crisis eventually receded, but the terrifying realisation of how close the world had come to self-destruction, permanently altered the course of papal history.
Just months later, in April 1963, while actively dying of stomach cancer, Pope John XXIII issued his final, most profound legacy to the world: the papal encyclical ‘Pacem in Terris’ (Peace on Earth). Written in the raw, trembling wake of near-catastrophe, it was a radical document. For the first time in history, a Pope addressed an encyclical not just to the Catholic hierarchy, but to “all men of goodwill”. It was a desperate, eloquent appeal to human reason, arguing that peace could not be built on a balance of terror or a mountain of industrialised weaponry, but only on the bedrock of mutual trust, human rights, and the moral law.
The anatomy of a Pontifical encyclical
This grand tradition of the Church stepping directly into historical fires did not begin—nor did it end—with the Cuban Missile Crisis. A papal encyclical (derived from the Greek enkyklios, meaning ‘circular’) is a formal pastoral letter sent by the Pope to guide the world through urgent geopolitical, economic, and technological upheavals.
The publication of Pope Leo XIV’s landmark encyclical, Magnifica Humanitas (Magnificent Humanity), directly continues this prophetic lineage. It positions itself alongside historical, legal and moral landmarks like Pope Leo XIII’s Rerum Novarum (1891) and Pope John XXIII’s Pacem in Terris (1963). To understand its weight, one must unpack the distinct mechanisms of an encyclical: its historical background, its persuasive power (how it shapes global discourse), and its canonical validity (its authority under Catholic canon law).
The perils of the industrial revolutions
Encyclicals do not emerge in a vacuum; they are reactive, serving as a moral mirror to global revolutions. Far from being disconnected responses to separate crises, the social encyclicals of the Church form a continuous, 135-year theological lineage. Each document marks a socio-economic intervention at a different, compounding stage of the Industrial Revolution, where technological progress threatened to outpace human ethics.
Driven by the First and Second Industrial Revolutions (mechanisation and mass production), Rerum Novarum (1891) issued by Pope Leo XIII addressed the soot-choked reality of the working class. It forcefully defended workers’ rights, unions, and the concept of a ‘just wage’ against unregulated capitalism and Marxist state socialism, asserting that human labour is not a mere commodity.
Forty years later, during the rise of massive financial cartels and corporate monopolies, Pope Pius XI introduced the principle of subsidiarity in the encyclical Quadragesimo Anno (1931). It argued that centralised powers—whether states or mega-corporations—must not strip local communities or individuals of their agency.
Tech and transcendence
Pacem in Terris met the Third Industrial Revolution head-on, confronting the automated, systemic danger of nuclear weapons by advocating for interstate relations grounded in universal human rights rather than military might. In Laborem Exercens (1981) Pope John Paul II defended the “priority of labour over capital”, as early computerisation and microprocessors began to automate factory floors. He asserted that machines and software are merely tools, and that the human being must always remain the active subject of work, never a passive object to be optimised.
Shifting the Church’s focus from physical machines to cognitive systems, Pope Benedict XVI warned in Caritas in Veritate (2009) against the “Technocratic Paradigm”—an ideological mindset where “what is technically possible becomes morally permissible”, fracturing truth and genuine human relationships. Pope Francis in Laudato Si’ (2015) expanded this critique by bridging digital ethics with environmental devastation, arguing that modern technological systems view both nature and human data as raw resources to be extracted and manipulated for profit.
The Nexus of Magnifica Humanitas
Issued on the 135th anniversary of Rerum Novarum, Pope Leo XIV’s Magnifica Humanitas marks the latest structural shift in this lineage, explicitly targeting the Fourth Industrial Revolution: data monopolies, and advanced artificial intelligence. Instead of mechanising muscle (like Rerum Novarum) or automating physical destruction (like Pacem in Terris), the digital age mimics and scales human cognition itself.
By confronting algorithmic bias, corporate data concentration, autonomous weapon systems, and the risk of viewing humanity as a dataset to be optimised, the text modernises the Church’s ancient defence of human dignity for the digital era.
In Catholic Canon Law, the authority of an encyclical is highly nuanced. It falls under the category of the Ordinary Magisterium (the everyday teaching office of the Pope). An encyclical is generally not an exercise of papal infallibility. It does not usually decree immutable dogma. However, it is far more than a mere personal opinion; it is an official, authoritative document meant to guide the conscience of the universal Church. According to the Code of Canon Law, the faithful are required to give the Ordinary Magisterium a ‘religious submission of intellect and will’. While it does not demand the absolute theological assent of defined dogma, it mandates respectful adherence and intellectual docility from Catholics.
The canonical validity of a new document like Magnifica Humanitas relies heavily on its seamless synthesis with prior texts. By pulling the principle of subsidiarity from Quadragesimo Anno to fight data monopolies, and the priority of labour from Laborem Exercens to critique AI deskilling, Pope Leo XIV ensures his arguments are an organic evolution of Church law rather than a sudden rupture.
If an encyclical’s canonical validity binds the internal Catholic conscience, its persuasive power is what sways the secular world. The influence of the Papacy rests entirely on moral authority and philosophical persuasion. By utilising natural law methodology — the idea that certain moral truths regarding human dignity are discoverable through human reason alone — the text bypasses purely sectarian barriers to reach secular policymakers.
Rather than issuing a blanket, anti-technology condemnation, the encyclical adopts the posture of an “informed critic”. This strategic nuance is exactly what draws tech leaders and global regulators into the conversation, offering a framework that measures technological progress by human flourishing rather than computational efficiency.
Babel vs. Jerusalem
Ultimately, this century-long line of papal encyclicals represents the Church’s continuous effort to ensure that technological progress serves humanity rather than dominating it. Just as Pope John XXIII used the terrifying clarity of the Cuban Missile Crisis to demand a world ruled by moral order rather than nuclear fear, Magnifica Humanitas operates on the same dual front.
In Magnifica Humanitas, Pope Leo XIV captures this historical struggle through two vivid biblical images: humanity’s choice between constructing the Tower of Babel or rebuilding Jerusalem. Babel represents the prideful, unbridled pursuit of technical power as an end in itself—a path that inevitably leads to the reduction of human beings into disposable datasets. Jerusalem represents a community structured around justice, relationship, and the absolute recognition of human dignity. As the gears of the Industrial Revolution continue to turn from steam to software, this papal lineage serves as a vital reminder: humanity’s true magnificence lies not in the supreme power of its machines, but in its capacity for justice, conscience, and love.
(Faisal C.K. is Deputy Law Secretary to the Government of Kerala. Views are personal.)