For the second part of our conversation between cognitive psychologist and bestselling author Steven Pinker and academic and podcaster David Runciman, who teaches politics and history at Cambridge University, we rejoin the discussion with the two looking at the roots of skepticism. This interview first appeared on Intelligence Squared in early 2019 at the time of the publication of Pinker's book, Enlightenment Now: The Case for Reason, Science, Humanism, and Progress.

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