While some would say the top issue facing Leo is his relationship with President Donald Trump and a possible trip to the U.S. — none is planned this year — Leo would probably point to his long-awaited first encyclical. Expected in the next few weeks, it deals with artificial intelligence and other peace and justice issues. Leo already has said he considers the AI revolution to be similar in existential scope to the concerns over workers’ rights at the turn of the century confronted by the previous Pope Leo XIII, in his landmark encyclical “Rerum Novarum” (“Of New Things”). “Like his namesake Leo XIII with the Industrial Revolution, Leo clearly sees the church as having something important to offer in an era of what may turn out to be epochal technological change,” said Dan Rober, associate professor of Catholic studies at Sacred Heart University.