STEVEN PINKER: How Common Knowledge and Rationality Make the World Go Round

from The Next Big Idea · host Next Big Idea Club

Harvard psychologist Steven Pinker shares five key insights from his brand new book, When Everyone Knows That Everyone Knows. He reveals how “common knowledge” — the hidden force of knowing what others know — shapes everything from financial bubbles and political revolutions to why we say “Netflix and chill.” Then we revisit our 2021 conversation with Steve about rationality, where he explains why smart people believe dumb things, why we're terrible at assessing risk, and how our species can be both brilliantly rational and spectacularly irrational at the same time. ——— Want to connect? 🔗 Follow Rufus on ⁠LinkedIn⁠ 📖 Subscribe to our daily newsletter, ⁠Book of the Day⁠ ✉️ Send us an email: ⁠[email protected]⁠

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This episode was published on September 25, 2025.

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