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Steven Pinker: When Everyone Knows That Everyone Knows

November 6, 2026 · 43 min

Show notes

What happens when we not only know something, but also know that others know it? How can common knowledge shape everything from friendship and social norms to markets and political power?

This week’s guest is Steven Pinker, professor of psychology at Harvard University, whose latest book has just been published in Swedish as »När alla vet att alla vet«. Pinker explains how common knowledge enables people to coordinate and how it shapes relationships, conventions and societies. The discussion ranges from American politics and the new ideologies of Silicon Valley to secular humanism, AI and the ways new technology may reshape science and human work.

Read more about the Swedish edition: När alla vet att alla vet

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