Issued in 1452 by Pope Nicholas V, Dum Diversas was a papal bull that granted King Afonso V of Portugal permission to conquer non-Christian lands. The text explicitly commanded the king "to invade, search out, capture, and subjugate the Saracens and pagans and any other unbelievers... and to reduce their persons into perpetual servitude." This formal decree provided a legal and religious green light for forced conversions, human trafficking, and territorial theft.
The immediate impact was devastating, laying the foundational groundwork for the transatlantic slave trade and West African colonization. Over time, Dum Diversas merged with later decrees to form the "Doctrine of Discovery." This legal concept claimed that European explorers gained automatic sovereignty over lands they "discovered." This ideology stripped Indigenous populations worldwide of their inherent rights, heritage, and land title.
The legacy of this document still shapes international law and property rights today. In nations like the United States and Canada, historical land disputes and court rulings regarding Indigenous sovereignty still reference the legal framework born from this discovery doctrine. It established a global systemic hierarchy and institutional racism, reinforcing a centuries-long assumption that European cultures were superior to others.
While the Vatican formally repudiated the Doctrine of Discovery in March 2023, the Church took a massive step further in May 2026. In his historic encyclical Magnifica Humanitas, Pope Leo XIV issued an unprecedented apology directly targeting the Holy See's own institutional guilt. He asked for pardon for the Vatican’s role in legitimizing slavery through 15th-century decrees like Dum Diversas, calling the centuries-long failure to condemn it "a wound in Christian memory."
