Athens, 416 BC. A tenuous peace holds. The city-state's political and military might are feared throughout the ancient world; it pushes the boundaries of social, literary and philosophical experimentation in an era when it has a greater concentration of geniuses per capita than at any other time in human history. Yet even geniuses go to the bathroom, argue with their spouse and enjoy a drink with friends.

Few of the city's other inhabitants enjoy the benefits of such a civilized society, though - as multicultural and progressive as Athens can be, many are barred from citizenship. No, for the average person, life is about making ends meet, whether that be selling fish, guarding the temple or smuggling lucrative Greek figs.

During the course of a day we meet 24 Athenians from all strata of society - from the slave-girl to the councilman, the vase painter to the naval commander, the housewife to the hoplite - and get to know what the real Athens was like by spending an hour in their company. We encounter a different one of these characters every chapter, with each chapter forming an hour in the life of the ancient city. We also get to spy on the daily doings of notable Athenians through the eyes of regular people as the city hovers on the brink of the fateful war that will destroy its golden age.

Over the past century humankind has managed to do the impossible and rein in famine, plague, and war. This may seem hard to accept, but, as Harari explains in his trademark style—thorough, yet riveting—famine, plague and war have been transformed from incomprehensible and uncontrollable forces of nature into manageable challenges. For the first time ever, more people die from eating too much than from eating too little; more people die from old age than from infectious diseases; and more people commit suicide than are killed by soldiers, terrorists and criminals put together. The average American is a thousand times more likely to die from binging at McDonalds than from being blown up by Al Qaeda.

What then will replace famine, plague, and war at the top of the human agenda? As the self-made gods of planet earth, what destinies will we set ourselves, and which quests will we undertake? Homo Deus explores the projects, dreams and nightmares that will shape the twenty-first century—from overcoming death to creating artificial life. It asks the fundamental questions: Where do we go from here? And how will we protect this fragile world from our own destructive powers? This is the next stage of evolution. This is Homo Deus.

With the same insight and clarity that made Sapiens an international hit and a New York Times bestseller, Harari maps out our future.