By Joshua McElweeVATICAN CITY, May 28 (Reuters) - Pope Leo this week repudiated a major teaching used by the Catholic Church since at least the fifth century to evaluate when countries might be justified in waging wars, in a move experts said could have long-reaching impact for global powers.The disavowal of the doctrine came in the pope's first major document, issued on Monday, which also urged global regulation of AI systems and made the clearest apology yet for the Catholic Church's historic role in supporting transatlantic slavery.

In first major document, Pope Leo calls for governments to slow AI development with legal safeguards and oversight, rejects just war, theory and apologizes for the Catholic…

Pope Leo urged governments to slow down and closely regulate the development of AI systems in his first major document, released on Monday, warning that they spread…

Pontiff appeals to world leaders in lengthy document at Vatican event