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How Common Knowledge Shapes the World | Steven Pinker | TED

Common knowledge is the secret engine of social life, letting us coordinate everything from meet-ups to markets to international diplomacy. With wit and wisdom, he invites us to better understand the ways we get into each other’s heads — and what it means when shared norms wobble. (Recorded at TED2025 on April 8, 2025) Join…

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Common knowledge is the secret engine of social life, letting us coordinate everything from meet-ups to markets to international diplomacy. With wit and wisdom, he invites us to better understand the ways we get into each other’s heads — and what it means when shared norms wobble. (Recorded at TED2025 on April 8, 2025)

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100 Comments

100 Comments

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  25. @thedumbdog1964

    August 25, 2025 at 6:50 pm

    Wasn’t this guy with Epstein?

  26. @GamesAccount-f4s

    August 26, 2025 at 5:50 pm

    Common Knowledge its just how simbolic thinking works

  27. @micheleele7299

    August 26, 2025 at 5:58 pm

    I refuse to play that game today…if you don’t make something clear & say it directly to me & look at me in my eyes I’m not going to waste energy trying to figure you out, read between the lines or read the room….especially if the person doesn’t like me….they are going to have to be uncomfortable & do the difficult thing of telling me to my face….& roll the dice as to what my reaction will be….I think it’s the only way to communicate….too long I’ve had people play games & I just won’t do it at my expense any longer…..

  28. @liantsang6758

    August 26, 2025 at 6:45 pm

    I know that you know that I know…=)

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    August 26, 2025 at 8:43 pm

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    August 26, 2025 at 8:44 pm

    Nexulon (NEX) feels like it’s just waiting for the right catalyst.

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    August 26, 2025 at 8:44 pm

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    August 26, 2025 at 8:45 pm

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    August 26, 2025 at 8:45 pm

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    August 26, 2025 at 8:45 pm

    Nexulon AI project is exactly the type of innovation this space needs.

  50. @FerozAbdulKadar

    August 26, 2025 at 9:07 pm

    Thanks!

  51. @IRAKLICHIKHLADZE

    August 27, 2025 at 7:25 am

    What was the purpose of this very interesting and scientifically very savvy speech? To listen to that we know that they know that I know that…..? This is all past today social media is the driver

  52. @kforest2745

    August 27, 2025 at 8:49 am

    “common knowledge” you mean common norms knowledge has nothing to do with it

  53. @christopherlipowski397

    August 27, 2025 at 9:15 am

    Theory of mind?

  54. @thereseeltonbechetoille4911

    August 27, 2025 at 10:05 am

    When Trump handed Melania’s letter to Putin it was a subversive act against Putin and his propaganda machine. Strange but true.

  55. @jessnol5518

    August 27, 2025 at 12:10 pm

    This man is known to assist with the defense of Epstein. I know that he knows. He said it’s rude to say. I say it’s beyond rude to defend those who hurt children.

  56. @BlessingsfromBridget

    August 27, 2025 at 12:13 pm

    This is why psycholinguistics is so interesting

  57. @Abdominal65

    August 27, 2025 at 12:16 pm

    Lying isn’t slick.

  58. @paddleduck5328

    August 27, 2025 at 1:02 pm

    This guy is popular at being disliked by both the right and the left.

    Is this the Ted talk he traveled to on Jeffrey Epstein’s plane?

  59. @The_Flynn_Effect

    August 27, 2025 at 1:09 pm

    Society rewards stupidity and obedience as pillars of its order. The crowd in the emperor’s procession knows the truth privately—the nakedness is evident to each eye—yet they persist in their delusion because obedience demands it. To acknowledge the truth openly would shatter the fragile edifice of power, which relies on the collective stupor of the obedient. The powerful need the stupid, for stupidity shields them from accountability; it transforms free individuals into a herd, easily led, where each fears to be the first to speak lest they stand alone. To remain silent in the face of rewarded stupidity is to partake in it, to let obedience erode the soul. Let us be the voices that turn private unease into public reckoning, lest society devour itself in its own deceptions.

  60. @jbeck9001

    August 27, 2025 at 1:44 pm

    He was on Epstein’s island

  61. @houseonsand

    August 27, 2025 at 1:49 pm

    Live and learn I guess

  62. @BeKindToEveryKind74

    August 27, 2025 at 1:53 pm

    Sorry, lost me at the Friends reference. 🙄

  63. @Highlyskeptical

    August 27, 2025 at 2:22 pm

    High status leaders master inference and innuendo to control low status simple followers that speak their minds without filters.

  64. @benl2036

    August 27, 2025 at 3:22 pm

    Based on the title I thought I had to come in here and disagree with everything because I thought it had to do with Jewish traditions of not saying what you want and if it happens then it’s meant to be. I’m glad I was wrong, this definitely emphasizes communicating.

  65. @thealienist4112

    August 27, 2025 at 3:30 pm

    04:50 350 mil Indians 😂 Rookie numbers

  66. @roselotusmystic

    August 27, 2025 at 3:34 pm

    🙏

  67. @clive-live

    August 27, 2025 at 4:59 pm

    Says the man who writes the most complicated economic books on the planet.

    • @clive-live

      August 27, 2025 at 5:07 pm

      Have you ever read his books? It was a great presentation, but I wish that Mr. Pinkcard? would explain his books so simply.

  68. @francinebacone1455

    August 27, 2025 at 5:02 pm

    Anyone ask him what he was doing with Epstein & friends yet?

  69. @professoroflogic8788

    August 27, 2025 at 5:04 pm

    I prefer to tell the truth, no matter how painful it may be for the other person or myself.

    I am autistic and cannot stand deception. To assume that everyone is aware of these unwritten rules is a clear indication that Mr Pinker has no clue what he is talking about.

    People like me need clearly communicated standards to follow. I would assume that everyone could benefit from these written standards, except for those who routinely break the rules.

  70. @jamesdean6660

    August 27, 2025 at 5:05 pm

    But Steven, how would you have felt yesterday morning if it were the case that you hadn’t been on the Epstein Island flight log?

  71. @direwolfen

    August 27, 2025 at 5:58 pm

    Inconceivable!

  72. @adamswierczynski

    August 27, 2025 at 6:08 pm

    If you are not mature enough to say it with pride, you’re not mature enough to get it.

  73. @TJ-kk5zf

    August 27, 2025 at 6:15 pm

    It’s so nice to see that Steven is still alive. There must be longevity in his family 😂

  74. @howardrobinson4938

    August 27, 2025 at 6:32 pm

    Always enjoy, um, Stephanie

  75. @antoniojones6256

    August 27, 2025 at 6:55 pm

    That was great!

  76. @JohnDoe-g2q8w

    August 27, 2025 at 9:45 pm

    I ALMOST FINISHED THIS VIDEO, JUST TO GIVE THIS FELLA A CHANCE. I HATE TO BE HARSH,

    BUT THE ONLY TITLE THAT IS APT FOR THIS IS, HOW TO LOWER YOUR IQ IN 10 MINUTES.

  77. @danielksilent7913

    August 27, 2025 at 9:45 pm

    When the thumbnail says ‘the beauty of not saying what you mean’ is it referring to things like Steven Pinker saying he was cool with Epstein but really meaning he’s okay with trafficking and pedophilia?

  78. @sarcasmo57

    August 27, 2025 at 11:23 pm

    Great talk.

  79. @vinven7

    August 28, 2025 at 12:08 am

    what happend to his voice? why is it gargled?

    • @TheRealInscrutable

      August 28, 2025 at 12:31 pm

      He sounds clear on my connection. Bad Internet connection perhaps?

  80. @avacadotoast56

    August 28, 2025 at 12:12 am

    Utterly useless talk with no pragmatuc relevance.

  81. @enjoyajeet

    August 28, 2025 at 2:31 am

    Bounced back 😮. Can anybody explain it in lean?

    “The only thing we have to fear is fear itself”

  82. @deordered.

    August 28, 2025 at 2:32 am

    For those who want to double check their blind-spot and any biases that one might have developed passively about Pinker’s takes, check Daniel Schamtenberger’s take on his views, even though in a classic Daniel move, he does it indirectly without name calling.

    • @secretvoiceunlocked

      August 28, 2025 at 3:39 am

      Link?

  83. @secretvoiceunlocked

    August 28, 2025 at 3:43 am

    Double speak and poetry encryption
    Poetry can mean many things all at once. The message you get depends on the lense or perspective you view if from. We encrypt to hide the message so it won’t be damaged before it reaches its intended target. Sometimes the target does not exist and will not for decades after the messages are sent.

  84. @secretvoiceunlocked

    August 28, 2025 at 3:44 am

    This guy he sounds very intelligent i admire anyone who seeks the truth wisdom insight understanding

  85. @Steve-d4m9m

    August 28, 2025 at 4:01 am

    If I take it that Pinker is being truthful and he is consistent then when he assesses students’ work he must mark what he guesses they mean rather than mark their actual words. By academic standards this would make him incompetent and unprofessional as an examiner, as he himself cannot but know.

  86. @SagaciousEagle

    August 28, 2025 at 4:16 am

    Common knowledge is a window to the mind.

  87. @randywaldron2715

    August 28, 2025 at 6:05 am

    He didn’t dare to address the effectiveness of common knowledge within competing information – and disinformation – bubbles in the context of the rise of neo–fascism.

  88. @lukeshula5270

    August 28, 2025 at 6:46 am

    I generally love Pinker, but his ending:
    “I hope… I don’t have to explain how these norms are currently under threat or what is at stake if we lose them…. It’s so obvious.”
    Was a weak message. Specificity and clarity are often substituted by ambiguity when an argument is lacking in substance or when the speaker is too cowardly to stand by his convictions. Can anyone articulate your perception of which norms are at risk of being upended? Only respond if you are capable of steelmanning the opposing viewpoint in good faith.

  89. @GooseTheFlick

    August 28, 2025 at 6:53 am

    I’m a fan of Dr Pinker, what a treat this is!

  90. @JGG3345

    August 28, 2025 at 7:19 am

    Steve doesn’t want to believe how serious the world’s problems are, or know why we struggle to stop them. He seems utterly unaware of the organised, powerful, far right, neo-liberal capitalist policies that have destabilized the world for 45 years and is currently in the process of turning the US into a fascist state as it cuts billions from government funding of science!

  91. @m2useinu

    August 28, 2025 at 8:44 am

    I would argue that the bookstore is both chivalry and patriarchy. Patriarchy is him making sure she is okay. He will find her. It’s not about bossing women around?

  92. @reasonablespeculation3893

    August 28, 2025 at 9:14 am

    Pinker; as smart and sharp as ever.

  93. @TheRealInscrutable

    August 28, 2025 at 12:37 pm

    So that final comment of Pinker. You interpret it based on the filter you arrived with. It’s either anti Trump or it’s anti Cancel Culture. And you believe that’s the only possible interpretation because you think that you and Pinker share a set of common knowledge.

  94. @BenTibbettsStudio

    August 28, 2025 at 12:42 pm

    This is excellent! Simple and clarifying. It’s refreshing to hear these dynamics explained so transparently, though I guess it is part of the principle of common knowledge that one need not explain them (in theory).

  95. @royalit98

    August 28, 2025 at 2:30 pm

    I’m glad youtube recommended this video to me a second time and I clicked on it. I really enjoyed this talk!

  96. @monalras1159

    August 28, 2025 at 5:14 pm

    Society: what a great video!
    Society: why don’t women just say what they want directly?!
    Lol
    I guess most of introverts, mathematics/computer people would find it really hard to live in a world like that. Especially if it’s a woman.. always misunderstood for things that she said and she simply literally ment :/

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