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 misinformation, prioritise conflict and risk leading the world down a path of unending war. Leo, who has adopted a more forceful tone in recent months and has drawn the ire of U.S. President Donald ‌Trump after criticising the Iran war, made a range of impassioned appeals to world leaders in the lengthy text, known as an encyclical. "What is needed is a more active political involvement that is capable of slowing things down when everything is accelerating," said Leo in ​the text, entitled "Magnifica Humanitas" (Magnificent Humanity).