Nexus Summary & key ideas explained

In 2023, researchers surveyed nearly 2,800 people who build artificial intelligence. More than a third of them said there was at least a one-in-ten chance that what they're making could end in disaster on the scale of human extinction.

Sit with that for a second. The experts aren't shrugging this off. And they keep building anyway.

Yuval Noah Harari, the historian behind Sapiens, thinks this is the oldest human story there is. We're brilliant at gathering power and terrible at handling it. We named ourselves the wise species, yet we've filled the air with carbon, the internet with lies, and the labs with machines we don't fully understand.

His explanation isn't that people are wicked or stupid. It's that the problem lives in our information networks: the stories, documents, institutions and now algorithms that tie millions of strangers together. For 100,000 years, these networks have decided what we believe, who holds power and how we fix our mistakes, or fail to.

Nexus walks through that history from Stone Age campfires to Silicon Valley. You'll see why holy books and witch hunts belong in the same conversation as Facebook, why a Soviet factory director went to prison for being the first to stop clapping, and why Harari thinks AI is unlike any invention before it.

But first, a basic question nobody seems to ask: what is information, anyway?