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@casssunstein.bsky.social

1,138 Followers  |  39 Following  |  226 Posts  |  Joined: 20.11.2024  |  1.6573

Latest posts by casssunstein.bsky.social on Bluesky

Promotional image for an author talk with Cass Sunstein. A black-and-white headshot of the author is at the top next to the cover of his book "Separation of Powers." Details for the event are below:

February 24, 2026 from 6 - 7 pm at MIT Museum. Tickets are $5. Book signing to follow. Books available while supplies last. Questions? Contact books@mit.edu.

Promotional image for an author talk with Cass Sunstein. A black-and-white headshot of the author is at the top next to the cover of his book "Separation of Powers." Details for the event are below: February 24, 2026 from 6 - 7 pm at MIT Museum. Tickets are $5. Book signing to follow. Books available while supplies last. Questions? Contact books@mit.edu.

"Separation of Powers" is an essential examination of the separation of powers and why it is necessary for both freedom and self-government. Join author @casssunstein.bsky.social at MIT Museum on Tues, Feb. 24th for a talk on this critical topic.

Link for details: mitmuseum.mit.edu/programs/aut...

07.02.2026 16:16 β€” πŸ‘ 6    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
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"There Is No Line" Group Polarization, Echo Chambers, and Transgression

On political extremism and a terrific new book on that subject.
casssunstein.substack.com/p/there-is-n...

08.02.2026 15:55 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Bounded Rationality: Heuristics, Judgment, and Public Policy Amazon.com: Bounded Rationality: Heuristics, Judgment, and Public Policy: 9780262543705: Dhami, Sanjit, Sunstein, Cass R.: Books

BOUNDED RATIONALITY (probably my least-bad book in recent years, over 500 pp.). @cfcamerer.bsky.social @ichotiner.bsky.social @michael-sanders.bsky.social @katymilkman.bsky.social
www.amazon.com/Bounded-Rati...

07.02.2026 12:39 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
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Decisions and Social Norms|Hardcover This pathbreaking book casts new light on how to handle life’s most difficult decisions. Edna Ullmann—Margalit and Cass R. Sunstein examine the role of social norms in creating both stabili...

Coming in 6 weeks - culmination of a long collaboration with the great Edna Ullmann-Margalit.
www.barnesandnoble.com/w/decisions-...

06.02.2026 12:44 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Separation of Powers: How to Preserve Liberty in Troubled Times Separation of Powers: How to Preserve Liberty in Troubled Times [Sunstein, Cass R.] on Amazon.com. *FREE* shipping on qualifying offers. Separation of Powers: How to Preserve Liberty in Troubled Times

SEPARATION OF POWERS: Coming in about a week.
www.amazon.com/Separation-P...

06.02.2026 12:42 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
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The 6 separations of power, and why they all matter As the 250th anniversary of our independence approaches, let us linger over the most important sentence that James Madison ever wrote, and the most relevant to the current moment.

"The U.S. needs each and every one of the six separations of powers. But from the standpoint of liberty, one thing is now clear: the most essential are those that deny judicial and legislative powers to the executive branch." thehill.com/opinion/whit... by @casssunstein.bsky.social

02.02.2026 21:32 β€” πŸ‘ 16    πŸ” 5    πŸ’¬ 1    πŸ“Œ 0

Six separations of powers (preview of coming book). @ichotiner.bsky.social
thehill.com/opinion/whit...

02.02.2026 16:06 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Bacon Is Shakespeare! When All Roads Lead to Rome

Bacon is Shakespeare! (On the funniest book I read in college.) @lsolum.bsky.social
casssunstein.substack.com/p/bacon-is-s...

30.01.2026 19:44 β€” πŸ‘ 4    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
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Minneapolis A Note on What People Think They Know

Minneapolis (on how we know what we know).
casssunstein.substack.com/p/minneapolis

27.01.2026 20:51 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Sunstein & Bar-Gill on Critics of β€œAlgorithmic Harm” Cass R. Sunstein (Harvard Law School; Harvard University - Harvard Kennedy School) &Β Oren Bar-Gill (New York University School of Law) have postedΒ Algorithmic Harm: A Response to Critics on SSRN. Here is the abstract: In our 2025 book, Algorithmic Harm, we contend that the use of algorithms can benefit consumers in many ways (largely because of greater personalization), but that it can also cause harm in the face of information deficits and behavioral biases (again, largely because of greater personalization).

Sunstein & Bar-Gill on Critics of β€œAlgorithmic Harm”

Cass R. Sunstein (Harvard Law School; Harvard University - Harvard Kennedy School) &Β Oren Bar-Gill (New York University School of Law) have postedΒ Algorithmic Harm: A Response to Critics on SSRN. Here is the abstract: In our 2025 book,…

27.01.2026 00:05 β€” πŸ‘ 2    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
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Early bird registration is open! Join us at the 12th Annual Conference at @harvardkennedy.bsky.social, Juneβ€―7–8,β€―2026! Featured speakers include Bob Cialdini, Cass Sunstein, Phil Tetlock, and more. tinyurl.com/yyb3xve7

Use code BSPA2026EARLYBIRD for $100 off. #BSPA2026

23.01.2026 15:40 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
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Minnesotans begin economic strike against ICE

A tv appearance, it appears
www.france24.com/en/minnesota...

24.01.2026 21:00 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Decisions and Social Norms This pathbreaking book casts new light on how to handle life’s most difficult decisions. Edna Ullmann-Margalit and Cass R. Sunstein examine the role of social norms in creating both stability and inst...

Now available for pre-order: DECISIONS AND SOCIAL NORMS, by Edna Ullmann-Margalit and me. (AI, which has read it, says that this may be my best book; if so, all thanks to the first author.) @cfcamerer.bsky.social @katymilkman.bsky.social @sendhil.bsky.social
www.e-elgar.com/shop/usd/dec...

23.01.2026 11:41 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Politics & Prose hosts @casssunstein.bsky.social for a talk on his latest book, "Separation of Powers: How to Preserve Liberty in Troubled Times."

πŸ“† Sun, Feb. 22nd
πŸ•“ 5:00 PM
πŸ“5015 Connecticut Ave NW, Washington, D.C.

Link for details: politics-prose.com/event/2026-0... @politicsprose.bsky.social

22.01.2026 23:05 β€” πŸ‘ 5    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
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Publius Symposium with Professor Cass Sunstein: On Liberalism: In Defense of Freedom | Stanford Law School 5:00 pm - Lecture 6:30 pm - Reception In what Politico has called a β€œstirring intellectual defense of liberalism from its critics across the politic

Much looking forward to speaking at Stanford in a few weeks, on liberalism and its discontents. (Behavioral economics might make an appearance.)
law.stanford.edu/event/publiu...

19.01.2026 13:16 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Tribalism What I Am Learning from the NFL Playoffs

Tribalism.
casssunstein.substack.com/p/tribalism

18.01.2026 14:47 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
Eight Ideas for 2028 <p><i>Whatever the party of the new president, elected in 2028, it would be worthwhile for the incoming administration to consider eight ideas, to be explicitly

Eight Ideas for 2028.
papers.ssrn.com/sol3/papers....

12.01.2026 13:29 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Rabbit Holes Speculations on Conspiracy Theories, Patterns, and Dots That Connect

Rabbit holes (this was really fun to write).
casssunstein.substack.com/p/rabbit-holes

10.01.2026 12:59 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
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ManipulationDetect: An AI Auditing Tool for Online Choice Ar Policymakers and regulators are increasingly interested in behavioural auditing tools to counteract manipulative designs in Online Choice Architecture (OCA). To date, auditing tools have been largely

Thrilled to share a new paper with @stuartmills.bsky.social &
@casssunstein.bsky.social. The paper discusses ManipulationDetect (previously NudgeDetect), a tool I launched a few months ago that uses LLMs to highlight 'manipulative' practices online.

ideas.repec.org/p/not/notcdx...

05.01.2026 09:41 β€” πŸ‘ 3    πŸ” 2    πŸ’¬ 0    πŸ“Œ 0
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Gulp. Seen at ASSA. (Thanks, @universitypress.cambridge.org!)

03.01.2026 18:34 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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The Unitary Executive Redux On a pervasive confusion out there

The unitary executive redux (on a pervasive confusion). @ichotiner.bsky.social @cfcamerer.bsky.social @donmoyn.bsky.social
casssunstein.substack.com/p/the-unitar...

03.01.2026 16:00 β€” πŸ‘ 2    πŸ” 4    πŸ’¬ 0    πŸ“Œ 0
The Enduring Relevance of Alger Hiss vs. Whittaker Chambers The Hiss-Chambers saga stemmed from a stunning accusation, by Whittaker Chambers, that Alger Hiss, a law clerk to Oliver Wendell Holmes, Jr., and a golden boy o

The Enduring Relevance of Alger Hiss vs. Whittaker Chambers (last paper of 2025, I am pretty sure). #HappyNewYear @ichotiner.bsky.social @cfcamerer.bsky.social @hcrichardson.bsky.social
papers.ssrn.com/sol3/papers....

30.12.2025 20:42 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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The New Right Reflections on Contemporary Manichaeism

The New Right. @ichotiner.bsky.social @cfcamerer.bsky.social
casssunstein.substack.com/p/the-new-ri...

28.12.2025 20:56 β€” πŸ‘ 2    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
Graphic for #AMS2026 Presidential Forum on 'Fast and Slow Thinking: The Human Factor in a Rapidly Changing World' on 25 January, 2026, at 4:00 PM CT, featuring moderator Bernadette Woods Placky, Climate Central's VP for Policy, and panelists Dr. Cass Sunstein, Harvard University Professor, and Dr. Hannah Perfecto, Marketing Professor at Washington University in St. Louis. Sponsored by Peraton. The background features geometric shapes in blue tones.

Graphic for #AMS2026 Presidential Forum on 'Fast and Slow Thinking: The Human Factor in a Rapidly Changing World' on 25 January, 2026, at 4:00 PM CT, featuring moderator Bernadette Woods Placky, Climate Central's VP for Policy, and panelists Dr. Cass Sunstein, Harvard University Professor, and Dr. Hannah Perfecto, Marketing Professor at Washington University in St. Louis. Sponsored by Peraton. The background features geometric shapes in blue tones.

πŸŽ„Merry Christmas! Start the new year with fresh insight at our #AMS2026 Presidential ForumπŸ’‘

Hear from experts in behavioral economics and public policy on how people make critical decisionsβ€”from responding to hurricane warnings to planning for climate impacts.

Learn more: https://bit.ly/4sakcQW

25.12.2025 16:15 β€” πŸ‘ 10    πŸ” 4    πŸ’¬ 1    πŸ“Œ 0
casssunstein.bsky.social

On today's episode, @alanrozenshtein.com talks to @casssunstein.bsky.social about his new book, "Imperfect Oracle: What AI Can and Cannot Do." www.amazon.com/Imperfect-Or...

23.12.2025 22:50 β€” πŸ‘ 6    πŸ” 2    πŸ’¬ 0    πŸ“Œ 0
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The Trial of the 20th Century Alger Hiss, Whittaker Chambers, and Today

Alger Hiss and the Trial of the 20th Century (and today).
casssunstein.substack.com/p/the-trial-...

23.12.2025 21:18 β€” πŸ‘ 1    πŸ” 2    πŸ’¬ 0    πŸ“Œ 0
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Decisions and Social Norms Decisions and Social Norms [Ullmann-Margalit, Edna, Sunstein, Cass R.] on Amazon.com. *FREE* shipping on qualifying offers. Decisions and Social Norms

Coming in March 2026. (I know, lots of things are coming then, but this is one of them.) @cfcamerer.bsky.social
www.amazon.com/Decisions-So...

22.12.2025 12:21 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
WTP: Epistemic, Behavioral, and Philosophical Challenges Both free markets and government regulators tend to use willingness to pay (WTP) to measure the value of goods. The reason for use of WTP is that it is the best

WTP: Epistemic, Behavioral, and Philosophical Challenges.
papers.ssrn.com/sol3/papers....

18.12.2025 01:36 β€” πŸ‘ 0    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
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The Lord's Prayer On forgiving trespasses

On the Lord's Prayer. (Unusual essay, highly personal.)
substack.com/home/post/p-...

17.12.2025 18:15 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Two Books on Liberalism Two booksβ€”one by Cass R. Sunstein and one by Philip Pilkingtonβ€”offer starkly different views of the future of liberalism.

Generous, sharp, and brisk review of my new book, ON LIBERALISM, in @foreignaffairs.com
www.foreignaffairs.com/reviews/two-...

17.12.2025 12:53 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0

@casssunstein is following 20 prominent accounts