Steven Pinker: Common knowledge can start revolutions

You know what you know, and I know what I know, but only when we know what the other knows do we have common knowledge.

That’s the crux of cognitive psychologist Steven Pinker’s latest work, focusing on the shift from private to public knowledge, and how this can suddenly change behaviours or even start revolutions.

Steven Pinker joins Tanjil Rashid to discuss.
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