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@charlesefferson

Attender of meetings at the University of Lausanne. #culturalEvolution #geneCultureCoevolution #appliedCulturalEvolution #evolutionCooperation #coordination #socialNorms #humanEvolutionaryEcology

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14.02.2025
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Latest posts by @charlesefferson

Poster of 13th Econ and Bio workshop on 'social influence and it's macro consequences'

Poster of 13th Econ and Bio workshop on 'social influence and it's macro consequences'

Travel grants πŸ“£

For the 13th Toulouse Economics & Biology Workshop (June 1–2, 2026, @IAST) we have travel fellowships for PhDs & early-career researchers presenting a poster. Apply by Feb 27! Details: www.iast.fr/conferences/...

18.02.2026 13:20 πŸ‘ 15 πŸ” 11 πŸ’¬ 1 πŸ“Œ 1
Apparent also is the government's ignorance of an American historical document called the Declaration of Independence. Thirty-three-year-old Thomas Jefferson enumerated grievances against a would-be authoritarian king over our nascent nation. Among others were:
1. "He has sent hither Swarms of Officers to harass our People."
2. "He has excited domestic Insurrection among us.”
3. "For quartering large Bodies of Armed Troops among us."
4. "He has kept among us, in Times of Peace, Standing Armies without the consent of our Legislatures."
"We the people" are hearing echos of that history. 
And then there is that pesky inconvenience called the Fourth Amendment:
The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and persons or things to be seized.
U.S. CONST. amend. IV.
Civics lesson to the government: Administrative warrants issued by the executive branch to itself do not pass probable cause muster. That is called the fox guarding the henhouse. The Constitution requires an independent judicial officer.
Accordingly, the Court finds that the Constitution of these United States trumps this administration's detention of petitioner Adrian Conejo Arias and his minor son, L.C.R. The Great Writ and release from detention are GRANTED pursuant to the attached Judgment.
Observing human behavior confirms that for some among us, the perfidious lust for unbridled power and the imposition of cruelty in its quest know no bounds and are bereft of human decency. And
the rule of law be damned.

Apparent also is the government's ignorance of an American historical document called the Declaration of Independence. Thirty-three-year-old Thomas Jefferson enumerated grievances against a would-be authoritarian king over our nascent nation. Among others were: 1. "He has sent hither Swarms of Officers to harass our People." 2. "He has excited domestic Insurrection among us.” 3. "For quartering large Bodies of Armed Troops among us." 4. "He has kept among us, in Times of Peace, Standing Armies without the consent of our Legislatures." "We the people" are hearing echos of that history. And then there is that pesky inconvenience called the Fourth Amendment: The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and persons or things to be seized. U.S. CONST. amend. IV. Civics lesson to the government: Administrative warrants issued by the executive branch to itself do not pass probable cause muster. That is called the fox guarding the henhouse. The Constitution requires an independent judicial officer. Accordingly, the Court finds that the Constitution of these United States trumps this administration's detention of petitioner Adrian Conejo Arias and his minor son, L.C.R. The Great Writ and release from detention are GRANTED pursuant to the attached Judgment. Observing human behavior confirms that for some among us, the perfidious lust for unbridled power and the imposition of cruelty in its quest know no bounds and are bereft of human decency. And the rule of law be damned.

storage.courtlistener.com/recap/gov.us...

31.01.2026 22:38 πŸ‘ 2 πŸ” 2 πŸ’¬ 0 πŸ“Œ 1

Very happy to see our ice-fishing paper on the cover of @science.org this week! πŸŽ£πŸŽ‰

We tracked large groups of Finnish competitive ice-fishers to study how social foragers use social information when searching for resources. 🐟

Link: www.science.org/doi/10.1126/... (contact me for open access)

30.01.2026 12:36 πŸ‘ 94 πŸ” 42 πŸ’¬ 4 πŸ“Œ 2
Transmissions Episode 2 with Dr Sarah Matthew
Transmissions Episode 2 with Dr Sarah Matthew YouTube video by Cultural Evolution Society

Excited for the new Transmissions episode on ASU's Sarah Mathew on how human warfare evolved, and her fieldwork in Kenya.

Watch here:
youtu.be/eUqEcxf5uBQ?...

New Episodes monthly! Created by @ferylbadiani.bsky.social and @ahnisnaahsi.bsky.social

CC: @arizonastateuni.bsky.social

13.01.2026 15:39 πŸ‘ 8 πŸ” 7 πŸ’¬ 0 πŸ“Œ 0
Preview
Adjusting the Aperture: Decolonizing Time in Studies of Human Behavior and Evolution Biological anthropology has long positioned foraging and often pastoralist populations as the most appropriate referent communities for the rigorous study of human behavior and evolution. With this, ...

My new paper on time and studies of human behavior and evolution is out - Just FYI it's a theory paper

onlinelibrary.wiley.com/doi/10.1002/...

12.01.2026 22:30 πŸ‘ 49 πŸ” 23 πŸ’¬ 3 πŸ“Œ 2

I’m recruiting PhD students at NYU (start Sept 2026).
Focus: cultural evolution, innovation & cooperation, AI & society, progress studies & development.

Deadline to apply is Dec 1- very soon.

I’ll share more about the move & new work soon.

Please share with students & retweet!

19.11.2025 19:07 πŸ‘ 12 πŸ” 8 πŸ’¬ 1 πŸ“Œ 1
Post image
14.11.2025 10:03 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Thank you to @psmaldino.bsky.social and Christian Zehnder for serving on the committee. And thank you Maria for the post-defense coffee mug. It says "Block chords." Check out "You're My Everything" on /Relaxin' with the Miles Davis Quintet/ for reference.

14.11.2025 10:03 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Congratulations to Dr @mariapykala.bsky.social for successfully defending her PhD thesis yesterday. Two big themes. 1) Social learning as a two-step process with psychological biases shaping both network formation and social learning given a network. 2) Cumulative cultural evolution in an AI world.

14.11.2025 10:03 πŸ‘ 7 πŸ” 2 πŸ’¬ 1 πŸ“Œ 0
The Oxford Handbook of Cultural Evolution hard copy

The Oxford Handbook of Cultural Evolution hard copy

Physical copies of this 71-chapter tome now exist. Do encourage your library to buy a copy…also doubles as excellent door stop! Co-edited with Jamie Tehrani and @rachkendal.bsky.social. @oxunipress.bsky.social @durhamanthropology.bsky.social

27.08.2025 14:30 πŸ‘ 62 πŸ” 28 πŸ’¬ 2 πŸ“Œ 6
Preview
Feature-based reward learning shapes human social learning strategies - Nature Human Behaviour This research advances a mechanistic reward learning account of social learning strategies. Through experiments and simulations, it shows how individuals learn to learn from others, dynamically shapin...

Through experiments and simulations, this study shows how individuals learn to learn from others, dynamically shaping the processes involved in cultural evolution. @davidschultner.bsky.social @bjornlindstrom.bsky.social
@lucasmolleman.bsky.social
www.nature.com/articles/s41...

23.07.2025 11:29 πŸ‘ 23 πŸ” 9 πŸ’¬ 0 πŸ“Œ 1

Word

18.07.2025 03:34 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

@jeremykoster.bsky.social @avbell.bsky.social @drelenamiu.bsky.social @duhe.bsky.social @eapower.bsky.social @kevinlala.bsky.social @charlesefferson.bsky.social

09.07.2025 06:27 πŸ‘ 4 πŸ” 3 πŸ’¬ 0 πŸ“Œ 0

Today @schimmelpfennig.bsky.social successfully defended his outstanding thesis on cultural evolution and organizational science. Congratulations, Dr. Schimmelpfennig!

30.06.2025 18:48 πŸ‘ 5 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Preview
Social clustering of preference for female genital mutilation/cutting in south-central Ethiopia - Nature Human Behaviour Recent estimates indicate that half of Ethiopian girls aged 15–19 years have experienced female genital mutilation/cutting (FGMC). This socio-centric social network study estimates the social influenc...

This socio-centric social network study estimates the social influence and social selection on preference for cutting female relatives using data from 5163 Ethiopian Arsi Oromo adults. @drsarahmyers.bsky.social @bristolantharch.bsky.social @bristoluni.bsky.social
www.nature.com/articles/s41...

10.06.2025 16:07 πŸ‘ 8 πŸ” 6 πŸ’¬ 0 πŸ“Œ 1
Preview
Social clustering of preference for female genital mutilation/cutting in south-central Ethiopia Nature Human Behaviour - Recent estimates indicate that half of Ethiopian girls aged 15–19 years have experienced female genital mutilation/cutting (FGMC). This socio-centric social...

New paper with Eshetu Gurmu, Alex Alvergne
@danielredhead.bsky.social Janet Howard & Mhairi Gibson! rdcu.be/eqjfT

10.06.2025 11:40 πŸ‘ 20 πŸ” 6 πŸ’¬ 1 πŸ“Œ 2
Image of cover of book called Sense and Nonsense: Evolutionary Perspectives on Human Behaviour, with a quote beside it saying, "Sense and Nonsense is the ultimate insider's guide to the history of one of our most ambitious attempts to understand ourselves" from Clark Barrett, University of California, LA.

Image of cover of book called Sense and Nonsense: Evolutionary Perspectives on Human Behaviour, with a quote beside it saying, "Sense and Nonsense is the ultimate insider's guide to the history of one of our most ambitious attempts to understand ourselves" from Clark Barrett, University of California, LA.

The new edition of 'Sense & Nonsense: Evolutionary Perspectives on Human Behaviour', co-authored with
@kevinlala.bsky.social , is available!

Get 30% off (promotion code ASPROMP8): global.oup.com/academic/pro...

Ebook is available on Kindle.

Thank you to Prof. Clark Barrett for the endorsement! πŸ§ͺ

27.05.2025 12:45 πŸ‘ 32 πŸ” 13 πŸ’¬ 1 πŸ“Œ 0
Preview
The cover of randomness: validating implicit methods for the study of sensitive topics | Evolutionary Human Sciences | Cambridge Core The cover of randomness: validating implicit methods for the study of sensitive topics - Volume 7

Hello, Bluesky. I guess we're here now! New paper in EHS with Sonja Vogt. Among other activities, we replicate our original FGC results from Sudan (Efferson et al, 2015) with a new larger data set. tinyurl.com/knt2v9fr

14.02.2025 11:39 πŸ‘ 4 πŸ” 4 πŸ’¬ 0 πŸ“Œ 0