In his first book, a global sensation, “Sapiens: A Brief History of Humankind,” Yuval Harari explained how Homo sapiens came to dominate our planet. “Homo Deus” is a kind of continuation—an attempt to look into the future. What will billions of people do if they are pushed out of the labor market by computers, and thus form a new, pointless class? How will religions react to genetic engineering? What will be the consequences of shifting authority and competence from living people to networked algorithms? What should a person do to protect the planet from its own destructive force?.. The main thing now, Harari believes, is to understand that we are at a crossroads and to grasp where the paths stretching out before us lead. We can’t stop the course of history, but we can choose the direction we move in.