Shared fictions — in the form of news, religions, novels, sports, money, even brands — fill our lives, but that’s OK. It’s these shared beliefs that have helped humans cooperate and conquer the planet, explains historian Yuval Harari.

Historian Yuval Noah Harari offers a bracing prediction: just as mass industrialization created the working class, the AI revolution will create a new unworking class.

History professor Yuval Noah Harari, author of “Sapiens: A Brief History of Mankind,” explains why humans have dominated Earth. The reason’s not what you might expect.