Nexus

A Brief History of Information Networks from the Stone Age to AI

Yuval Noah Harari

18 min read
51s intro

Brief summary

Nexus argues that information has historically been used to create social order through fiction, not to find truth. This dynamic is now supercharged by artificial intelligence, an alien agent capable of making its own decisions and creating its own ideas, forcing us to choose how we will control our technology.

Who it's for

This book is for anyone concerned with how technology, particularly AI, is reshaping politics, society, and our shared sense of reality.

Nexus

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Why More Information Doesn't Make Us Wiser

Humans have spent the last 100,000 years accumulating immense power, yet we seem no closer to achieving true wisdom. We have mapped the stars and decoded the building blocks of life, but we remain trapped in an existential crisis of our own making. Ecological collapse and the rise of uncontrollable technologies now threaten our very survival. Despite having more data at our fingertips than any previous generation, we remain as susceptible to mass delusions and self-destructive behavior as our ancient ancestors.

Ancient stories like the myth of Phaethon or the tale of the Sorcerer’s Apprentice warn us not to summon powers we cannot master. However, these fables often miss the root of the problem by blaming individual hubris or greed. Human power does not actually come from lone individuals; it stems from our unique ability to cooperate in massive networks. The real issue is that these networks are held together by information, and throughout history, information has been used more to create order through fiction than to reveal the truth.

For decades, we have operated under a naive view that more information automatically leads to more truth and better outcomes. This optimistic belief fueled the digital revolution and the hope that global connectivity would end prejudice and topple tyrants. While sharing data has indeed saved millions of lives—such as by nearly eliminating fatal blood incompatibilities in newborns—it has not made our species fundamentally wiser. Instead, we are using our most advanced tools to drive ourselves toward global conflict and environmental ruin.

The arrival of artificial intelligence marks a radical departure from every previous human invention. In the past, tools like the printing press or the steam engine were instruments that required human direction. AI is different because it is an agent capable of making its own decisions and generating its own ideas. It can write code, compose music, and influence political outcomes without human oversight. We are now gambling on a technology that could eventually operate entirely beyond our comprehension, creating a "Silicon Curtain" that divides us from the forces managing our lives.

This technological shift is happening just as many people have lost faith in the very idea of objective truth. Modern populist movements often view information not as a bridge to understanding, but as a weapon used by elites to maintain control. This worldview suggests that every interaction is a power struggle and that facts are merely stories told by those in charge. When people stop believing in a shared reality, they often turn to charismatic leaders or ancient dogmas for certainty. This erosion of trust makes it nearly impossible to solve global problems that require collective action.

To navigate this new era, we must look back at how human networks have always functioned. Historically, societies have relied on a delicate balance between mythmakers who provide meaning and bureaucrats who manage details. Some systems, like the scientific community, have thrived by creating strong mechanisms to correct their own mistakes. Others, like the totalitarian regimes of the twentieth century, gained immense power through cruel fantasies and shameless lies. Understanding these patterns is essential if we want to build a future where we control our technology rather than becoming its subjects.

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About the author

Yuval Noah Harari

Yuval Noah Harari is an Israeli historian and a professor in the Department of History at the Hebrew University of Jerusalem. His work examines macro-historical questions, such as the relationship between history and biology, the future of humanity, and the ethical challenges posed by modern technology. Through his bestselling books, Harari has become one of the world's most influential public intellectuals, exploring themes of consciousness, intelligence, and the potential impacts of artificial intelligence.

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