Dr Arthur Brooks
@drarthurbrooks·326K subscribers·364 videos
4 Ways to Use Common Knowledge to be Happier with Steven Pinker
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October 6, 2025
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So much of life depends not only on what we know, but also on what we know that others know as well. This shared awareness—what social scientists call common knowledge—explains how we cooperate, why markets rise and fall, and why silence in the face of cancel culture is so damaging.
In this episode of Office Hours, I’m joined by Dr. Steven Pinker, Harvard psychologist and bestselling author of The Language Instinct and Enlightenment Now. We discuss his new book, When Everyone Knows That Everyone Knows, and explore how common knowledge influences cooperation, politics, humor, and even happiness, and why using it as a gift, not a weapon, can help us all live better.
We cover:
• What common knowledge really is and why it matters in everyday life
• How nonverbal signals like eye contact or laughter shape our social lives
• Why so many Americans hide their true beliefs
• 4 principles that can help you live a happier, more meaningful life
• How to practice radical honesty with clarity and kindness
We’d love to hear any feedback you have. Please email us at officehours@arthurbrooks.com. And please leave a review on Apple or Spotify. Thanks for listening!
*Brought to you by:*
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*Where to find Steven Pinker:*
*Where to find Arthur Brooks:*
• Email: officehours@arthurbrooks.com
*Timestamps:*
(00:00) Intro
(05:04) What common knowledge means and why it’s tricky
(05:50) Evidence of common knowledge beyond humans
(07:26) Nonverbal ways that we share common knowledge
(08:08) Examples of how common knowledge spreads and is suppressed
(10:54) How dictators repress common knowledge through censorship
(12:44) Politeness vs. kindness when it comes to common knowledge
(14:55) The threat of cancel culture to academic freedom
(19:39) What happens when people are afraid to speak up
(23:04) Why we fall for misinformation
(25:11) Arthur’s 4 big takeaways on common knowledge for wellbeing
(29:02) The problem with collective illusion
(31:20) What the Populace survey reveals about how groups of Americans really feel
(33:39) Bridgewater Capital’s policy of radical honesty
(36:15) How the 4 principles from Common Knowledge relate to happiness
*Referenced:*
• Leadership and Happiness course
• How to Build a Life
• The Happiness FilesInsights on Work and Life
• The Language InstinctHow the Mind Creates Language
• The Better Angels of Our NatureWhy Violence Has Declined
• RationalityWhat It Is, Why It Seems Scarce, Why It Matters
• ...References continued at
Production and marketing by For inquiries about sponsoring the podcast, email jordan@penname.co
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