As climate change accelerates, economies collapse, governments destabilize, and technology disrupts, we’re entering a new age of mass migration, one that will scatter people of all socioeconomic backgrounds and usher in an era of radical change. As this trend continues, we ask: Which areas will people abandon and where will they resettle? Which countries will accept or reject them? As today’s world population, which includes four billion restless youth, votes with their feet, what map of human geography will emerge?