Book excerpt: "Nexus" by Yuval Noah Harari

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Yuval Noah Harari, the author of the bestseller "Sapiens: A Brief History of Humankind," returns with "Nexus: A Brief History of Information Networks from the Stone Age to AI" (Random House). It examines how intelligence has shaped and controlled civilizations throughout history, and the role of artificial intelligence in changing society, economics and politics.

Read an excerpt below.