The death of Pope Francis leaves not just an empty chair at the top of the worldwide Catholic Church, with its estimated 1.4 billion followers. It leaves a huge hole in geopolitics because Francis was, unquestionably, a player. All popes, by virtue of also being a head of state with a status at the United Nations, are political but Francis planted himself in the middle of three of the biggest crises to grip the world since the end of World War II. These are the north-south global divide, principally over wealth, poverty, and resources; climate change and its associated traumas...