Overview
- The encyclical, which was released Monday, states that the centuries‑old just war tradition is outdated while still recognizing a very narrow right of self‑defense.
- Leo forbids entrusting lethal or irreversible decisions to artificial systems, writing that moral judgment cannot be reduced to calculation and that no algorithm can make war morally acceptable.
- The document offers the Vatican’s clearest apology yet for the Church’s historic support of transatlantic slavery and ties moral responsibility to broader political and historical accountability.
- U.S. political figures have pushed back by invoking just war criteria to defend current conflicts, and Catholic leaders and theologians are debating how the shift will affect military teaching and ethical guidance.
- The encyclical could reshape military ethics, spur new international and legal discussions on AI in warfare, and change how Church leaders counsel governments and soldiers about the use of force.