More than ever, the world finds itself faced with common problems that affect most of the planet's population in some way: climate change, poverty, escalating violence, international conflicts, illness. And while an "us v. them" mentality persists, a growing sense of empathy, of connection, with those in remote parts of the world has caught hold and is spreading. The authors argue that empathy and feelings of kinship with others are necessary to preventing the collapse of civilization. Through a careful examination of how humans must learn to relate to one another to avoid global calamity, they show how empathy can help to create a sustainable society of many billions of individuals.