Sean (@s_sullivan) header
Sean (@s_sullivan) profile picture

The time is now. It's running out.

Brooklyn, NY
Joined October 2007
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Here’s my substack: substack.com/miloandthecalf
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newyorker.com/magazine/2001/… I remember reading this article and suddenly realizing how illuminating economics could be. Posner raised the world's effective IQ.
We mourn the loss of Senior Lecturer Richard Allen Posner, a longtime #UChicagoLaw scholar, former federal appellate judge, and pioneer in the field of law and economics, who died on November 10. Read more about his legacy: buff.ly/e3c3WdL
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An absolute giant of the law and someone who really personified the type of relentless curiosity and productivity that I deeply admire.
I am so, so sorry to learn of the death of Judge Richard Posner. I was honored to call him a friend. Dick Posner, rest in peace. (I'll have much more to say about Judge Posner in a future post.)
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NYC lottery system for high school is a valiant attempt to inject more equity into the system. What it also does is make a certain type of parent feel like if they’re child doesn’t get into a top school it is somehow their fault.
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We COULD just demand that every school be an Eleanore Roosevelt or Millenium but we don’t.
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Hello to all my soon to be ex followers. This account isn’t really about NYC student commute times, but maybe it should be.
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Is my most popular tweet ever gonna be an off hand comment on school commute times?
Someone should write an article on high school kids in NYC and their insane commutes. I've spoken to kids commuting two hours both ways everyday. One kid at the Tech open house told me he comes to Brooklyn from "past Flushing". Mind blowing.
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I think unusually productive friendships and deep, long-lasting creative partnerships are under-theorized. I’d really like to better understand the alchemy that produces a Warren/Charlie, Jobs/Wozniak, Caro/Gottlieb, Will/Ariel Durant, and so on.
Pounding Diet Cokes and peanut brittle for the rest of the day. Don’t text
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Teens are back!
U.S. teens saw notable declines in self-reported sadness and suicidal ideation from 2021 to 2025. Relative to 2021, they were also more likely in 2025 to: 1) play sports (49% to 58%) 2) do strength training (45% to 51%) 2) eat fruit >=twice/day (19% to 28%) 3) eat at least one vegetable/day (55% to 63%)
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Someone should write an article on high school kids in NYC and their insane commutes. I've spoken to kids commuting two hours both ways everyday. One kid at the Tech open house told me he comes to Brooklyn from "past Flushing". Mind blowing.
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I will never tire of stressing just how philosophically rich science fiction is as a genre. It truly is—in a description commonly attributed to Pamela Sargent, but also found in Isaac Asimov, Ursula K. Le Guin, and Gene Wolfe among others—“the literature of ideas.”
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My letter in today's @NYTimes boils down to: Maybe what kids really need is not more $ for mental health interventions but more independence and free play. At least try that FIRST. nytimes.com/2026/11/07/opini…
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U.S. teens saw notable declines in self-reported sadness and suicidal ideation from 2021 to 2025. Relative to 2021, they were also more likely in 2025 to: 1) play sports (49% to 58%) 2) do strength training (45% to 51%) 2) eat fruit >=twice/day (19% to 28%) 3) eat at least one vegetable/day (55% to 63%)
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I think about this quote all the time: "There is always time to do more, most people, even the productive, have a day that is at least forty percent slack." - @tylercowen
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There are enough hours in the day if you use them right.
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reminding everyone that Mississippi is one of the best states in the country at teaching kids to read and the rest of us should be taking notes
Scott Colom told reporters yesterday that his favorite book is Anna Karenina by Tolstoy. He also enjoys War and Peace, the Robert Caro books and Things Fall Apart. Probably his worst take is he doesn’t enjoy James Baldwin’s novels, but everyone’s allowed a few bad opinions.
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I started keeping a paper journal again and it's actually very good and rewarding.
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Because we live in NYC we are doing the most insane high school tour circuit and every single school touts how many APs they offer and how many kids take them. My wife was suspicious, turns out that as usual, she was right.
Wow, a pretty damning article with diverse lines of evidence.
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This feels like a truly generational vibe shift in politics – a swing so large and enduring it won't be reversed for at least 6 months.
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