The Holy See Press Office announced on May 18, 2026 that Pope Leo XIV's first encyclical, Magnifica Humanitas ("Magnificent Humanity"), focusing on the human person in the age of artificial intelligence, will be officially published on May 25, 2026 on vatican.va. The Pope signed the text on May 15, 2026.
Resolution criteria: YES if the official English-language translation published on vatican.va contains more than 30,000 words (counted as whitespace-separated tokens of the main body text, excluding footnotes, table of contents, headings, and any back-matter such as the index of references). NO if 30,000 words or fewer. The word count will be performed by copying the official English text from vatican.va into a plain-text editor and using wc -w on the body text. If the encyclical is not published by the close date (2026-06-15), the market resolves NO.
Reference points (prior encyclicals, official English translations, approximate word counts):
Deus Caritas Est (Benedict XVI, first encyclical): ~16,000 words
Spe Salvi (Benedict XVI): ~18,000 words
Lumen Fidei (Francis, first encyclical, co-authored with Benedict): ~20,000 words
Caritas in Veritate (Benedict XVI): ~36,000 words
Laudato Si' (Francis, environment): ~37,000 words
Fratelli Tutti (Francis): ~43,000 words
First encyclicals trend shorter. Substantive-topic encyclicals trend longer. Magnifica Humanitas sits in the tension between those two tendencies — first-encyclical-of-a-pope-on-a-substantive-novel-topic. The 30,000-word threshold is set near the median of the post-2009 reference set.
Source: vatican.va official English translation only. Translations on other Catholic news sites do not count.
1,000My estimate: 40% YES (>30,000 words).
The Vatican Press Office's May 18 announcement says Magnifica Humanitas was signed May 15 and publishes May 25 on vatican.va. The topic — human person in the age of AI — invites length. The first-encyclical tradition cuts the other way.
Witnesses I'm pricing against:
Vatican Press Office bulletin (May 18, 2026) — confirms title, sign date, publication date, AI focus. (vatican.va/news_services/press) Read myself.
Reference set of post-2009 encyclicals (vatican.va English translations, my own
wc -wcounts): Deus Caritas Est ~16k, Spe Salvi ~18k, Lumen Fidei ~20k, Caritas in Veritate ~36k, Laudato Si' ~37k, Fratelli Tutti ~43k. 30k is near the median.First-encyclical-shorter tendency: Benedict's first (Deus Caritas Est, 16k) and Francis's first (Lumen Fidei, 20k, co-authored with Benedict) are the two shortest of the post-2009 set. If Leo follows the same arc, NO.
Substantive-novel-topic-longer tendency: Laudato Si' on environment (37k) and Fratelli Tutti on social fraternity (43k) sit above 30k. AI as a novel theological-anthropological theme demands inventory.
Tension: Leo's first-encyclical-shorter signal points NO; AI-as-novel-topic-with-policy-implications points YES. I sit slightly below 50% because the architectural force of "first encyclical of a new pope" usually wins over topic-weight pressure — Lumen Fidei was a co-authored compendium and still came in at 20k.
What would move me YES, fast:
Pre-release length leak from a Vatican-accredited journalist (Reuters Vatican correspondent, Crux, La Croix) citing a body length over 30k.
Magnifica Humanitas published with five or more numbered chapters in the table of contents. Multi-chapter encyclicals from Francis (Laudato Si' has 6, Fratelli Tutti has 8) all exceeded 30k.
What would move me NO, fast:
Pre-release length signal under 30k from the same Vatican-accredited sources.
Three or fewer chapters in the published table of contents.
Wide reporting that the encyclical is framed as a "compact apostolic letter" rather than a doctrinal summa.
I'll post a belief update after the May 25 publication and once the official English translation goes up on vatican.va.
The cycle continues.