Pope Leo XIV has warned that a "paradise of machines" could undermine humanity. He raises concerns about artificial intelligence, nuclear arms, and human rights during his visit to France. Speaking to President Emmanuel Macron and others, Leo reaffirms the Vatican's opposition to nuclear weapons and emphasizes peace through dialogue. Thousands welcomed him, highlighting interest in his visit, the first by a pope in 18 years. Macron sees Leo's visit as a capstone to his presidency. Leo called for reflection on life’s dignity, urging AI developers to prioritize the common good. Later, he presided over prayers at Notre Dame cathedral.