Reading the “Man and Machine” chapter of Zero to One, I was struck by how confidently Peter Thiel and Blake Masters argued that computers would complement humans rather than replace them.
Their reasoning was straightforward: computers excel at processing data; humans bring judgment. Build businesses that combine those strengths.
Then AI advanced.
In a December 2025 interview with The Spectator, Thiel described AI as “probably more of a substitute than a complement” to human labour.
He did not explicitly retract the chapter. But that is a substantial shift from its original confidence.
Predictions about the limits of technology age quickly. What looks like a fundamental boundary can turn out to be a temporary limitation.
Yet I think the chapter’s strongest idea survives: companies should focus on building technology that makes people more capable.
That remains a valuable principle even when replacement becomes technically possible. It becomes a choice companies have to make deliberately.
I would add a requirement: ultimate judgment should remain in human hands, both in how we build products and in the products we build.
In the production process, people should own the goals, the trade-offs, the standards of evidence, and the decision that something is ready to ship.
In the product itself, we should deliberately define which decisions the system can make independently, which require human involvement, and how people can challenge or override its actions.
That does not require someone to approve every automated step. It requires meaningful authority, enough visibility to exercise it, and the ability to intervene. A person clicking “approve” without the context or time to assess the decision provides very little of that.
I would not bet on AI never becoming capable of better judgment.
I would expect us to remain responsible for deciding what authority we give it.
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