Pope Leo XIV’s first encyclical Magnifica Humanitas, concerning artificial intelligence, already is widely compared to Rerum Novarum, issued in May 1891.
To be sure, it can be argued that all encyclicals since Rerum Novarum have been about Catholic social teaching. “Magnifica Humanitas” addresses AI in that context.
Rerum Novarum addressed the rights and duties of capital and labor during the Industrial Revolution. Its main points include defending private property rights, advocating for workers' dignity and living wages, upholding the right to form unions, and emphasizing the state's obligation to protect the vulnerable while rejecting both unrestrained capitalism and socialism.
Magnifica Humanitas might have importance as one of the first major global religious/social statements treating AI as a civilization-scale issue comparable to the Industrial Revolution.
As always, Catholic social doctrine is based on the dignity of the human person. So the document emphasizes AI in the context of the primacy of the human person and human dignity, as well as the need to subordinate technology to human ends.
It also is fair to note that encyclicals are often read through the lens of the reader’s prior commitments, so people tend to notice the parts that confirm what they already think and dismiss the rest.
Encyclicals are pastoral and argumentative documents, so they are written to persuade, guide, or correct on issues that are already contested. That means readers who come in already aligned with the pope will often see clarity and continuity, while critics may see ambiguity, overreach, or hidden agendas.
In practice, that makes an encyclical a kind of mirror: it can reflect the reader’s assumptions as much as the author’s intent.
Conservatives would likely read Magnifica Humanitas as a defense of human dignity, family, labor, and limits on technocratic power.
Liberals would likely see a call for regulation, solidarity, and protecting vulnerable people from AI harms.
Pro-AI readers would probably emphasize that it is not anti-technology but an attempt to steer AI toward the common good.
Anti-AI readers would focus on its warnings about dehumanization, manipulation, and the erosion of responsibility.
The encyclical is a balancing act, to be sure. As Rerum Novarum had to steer between socialism and secular individualism (also humans as commodities) as contrary to Catholic values, so Magnifica Humanitas strives to balance technology and its subordination to human needs and values.