How do strangers―and even enemies―become friends?

The answer is one of the most surprising true stories in human history. Thousands of years ago, long before modern borders existed, people from different lands met, traded, told stories, and sometimes married. Through these connections, new cities rose, cultures blended, and shared languages and religions emerged. But when differences grew larger than similarities, neighbors could become rivals, sparking conflicts that changed the course of history.

In Unstoppable Us, Volume 3, Harari explores how early civilizations interacted across continents: exchanging food and ideas, travelling vast oceans, building mighty empires, and forming the first countries and communities. It’s a sweeping tale of cooperation and conflict―of how humans learned to unite, compete, and create the world we know.