Pope Leo XIV on Monday laid out his vision for the preservation of human dignity in the age of artificial intelligence by releasing his first encyclical, “Magnifica Humanitas” or “Magnificent Humanity.”“The document presented at the Vatican with Anthropic founder Christopher Olah highlights how the Catholic Church continues to use one of its oldest forms of communication to address modern social and ethical challenges.An encyclical is a formal letter written by the Pope, usually addressed to bishops around the world. These documents are used to provide authoritative teachings on important moral, social, or political issues. Although they do not have the legal status of papal bulls, Catholics are encouraged to use them as guidance in their daily lives.Although Popes have written letters to the faithful since the early days of the Church, Pope Benedict XIV, who led the Church from 1740 to 1758, is credited with shaping the encyclical into the form recognized today.“According to its etymology, an encyclical (from the Greek agkyklios, kyklos meaning a circle) is nothing more than a circular letter. In modern times, usage has restricted the term almost exclusively to certain papal documents which differ in their technical form from the usual style of Bulls or briefs, and which in their superscriptions are clearly addressed to the patriarchs, primates, archbishops and bishops of the Universal Church. Do. Apostolic See. Exceptionally, the encyclical is also sometimes addressed to the archbishops and bishops of a particular country,” according to the Catholic Encyclopedia.Leo XIV’s “Magnifica Humanitas” now joins a long series of influential encyclicals that shaped debate both within and outside the Catholic Church.

Five encyclopedias that matter

1. “Rerum Novarum” (1891) – On the rights of workersIssued by Pope Leo XIII during the Industrial Revolution, “Rerum Novarum”, meaning “Of New Things”, became the foundation of modern Catholic social teaching.The document rejected both socialism and laissez-faire capitalism and defended workers’ rights, including the right to form unions and earn a living. According to the New York Times, it also inspired a broader social justice movement within the church.It is also the encyclical that inspired the current Pope to choose the name Leo XIV. The Pope formally signed the “Magnifica Humanitas” on May 15, 2026, the anniversary of “Rerum Novarum”, even though it was publicly presented 10 days later.2. “Pacem in Terris” (1963) – On world peaceWritten by Pope John XXIII during the Cold War, “Pacem in Terris,” or “Peace on Earth,” was addressed not only to Catholics but to all humanity.The encyclical called for a ban on nuclear weapons and proposed the idea of ​​a global public authority working for the “universal common good”, seeing the United Nations as a first step.It also urged people to participate in public life and “work together for the benefit of the entire human race.”When it was released, The New York Times published the full text.3. “Humane Vitae” (1968) – On birth controlPope Paul VI’s “Humanae Vitae”, meaning “of human life”, reaffirmed the Catholic Church’s opposition to artificial birth control.The central teaching of the document states that every act of sexual intercourse must be free from deliberate efforts to prevent pregnancy.The encyclical immediately sparked debate among Catholics, a discussion that has continued for decades. According to a 2024 Pew Research Center poll, a majority of Catholics in the United States and Latin America believe the church should allow artificial birth control.To help stop the spread of AIDS, many bishops later offered qualified support for teaching about condoms.4. “Caritas in Veritate” (2009) – on economicsIn “Caritas in Veritate” or “Charity in Truth”, Pope Benedict XVI called for a massive rethinking of the global economy following rising economic inequality.The encyclical criticized the growing gap between rich and poor, urged ethical behavior in finance and called on businesses to take greater social responsibility.According to the NYT, like “Pacem in terris”, it also argued for a global political authority to help regulate the economy.Many scholars praised the document for its reflections on love, truth, and justice, although critics described it as difficult to read due to its dense language and broad themes.5. “Laudato Si'” (2015) – On the environmentPope Francis’ ‘Laudato Si’, meaning ‘Praise You’, was the first encyclical to focus solely on the environment.The document defines care for the planet as a moral and spiritual duty rather than simply a matter of politics, science or economics. Francis also highlighted the links between climate change, poverty and social instability.The encyclical became influential in the global environmental movement, although Francis later expressed regret in the 2023 document that little progress had been made on ecological issues.With the “Magnifica Humanitas”, Leo XIV has now placed workers’ rights, peace, economics, birth control and climate change, as well as artificial intelligence, as issues addressed through the papal encyclical, continuing a tradition that has shaped Catholic teaching for centuries.