Sign in

Paul Smaldino

@psmaldino.bsky.social
6.1K followers 995 following 861 posts

Paradigmatically promiscuous scientist. Ankylosaur enthusiast. Modeler of cultural evolution and related topics. Anti-fascist. Professor at UC Merced, external prof at the Santa Fe Institute and CSH-Vienna. Web: smaldino.com/wp

PostsRepliesMedia
Reposted by Paul Smaldino
Ruth Mace @ruthmace.bsky.social · 30/09/2026
Religious celibacy driven by marriage and wealth inheritance across cultures. brideprice=monks, dowry=nuns. New paper by Gabriel Saffa, Sara Serbaji and yours truly www.nature.com/articles/s41...
nature.com
Religious celibacy is linked to marriage and wealth transmission practices across different world religions - Nature Communications
Lifelong religious celibacy has been linked to sibling competition over parental wealth. Here, the authors show that celibacy is linked to marriage patterns, and its prevalence among men and women is ...
1189
Paul Smaldino @psmaldino.bsky.social · 27/09/2026
I just gave a talk on interdisciplinary yesterday that features a call for interdisciplinary people and not just diverse teams of disciplinary types. Today I read this essay with delight. Viva antedisciplinarity. journals.plos.org/ploscompbiol...
journals.plos.org
“Antedisciplinary” Science
15913
Paul Smaldino @psmaldino.bsky.social · 25/09/2026
Read our commentaries and the target article! #blobbyblobbyblobblob
161
Reposted by Paul Smaldino
Brian O'Meara @omearabrian.bsky.social · 21/09/2026
Public access to the Academy of Natural Sciences in Philadelphia is being shut down after this Sunday (unless stopped). Yet, 1) Their website has zero indication of this anywhere 2) Promises a botany exhibit through Feb 14, 2027 3) Allows people to join as members for "an entire year" of access
23318
Reposted by Paul Smaldino
Dr Abeba Birhane @abeba.blacksky.app · 20/09/2026
i hate it @wileyonlinelibrary.bsky.social, please kill this
2548679
Reposted by Paul Smaldino
Craig Reynolds @craigreynolds.bsky.social · 16/09/2026
Someone called Hannah Frye did a nice explainer about this a few months ago: www.youtube.com/shorts/z-rSA...
youtube.com
Why birds don't crash (and what humans can learn from them)
YouTube video by Hannah Fry
42913
Reposted by Paul Smaldino
Cultural Evolution Society @culturalevolsoc.bsky.social · 14/09/2026
ACE Research Grant Alert 🚨! CES will give out two awards of up to $3000 each to support early career research projects in cultural evolution. The award is open to applicants worldwide, with an application deadline of October 9th 2026, 9:00 AM AoE. Applications: forms.gle/dsLdKQuNBH4W...
forms.gle
ACE Early Career Research Grants
CES will give out two awards of up to $3000 each to support research projects in cultural evolution. To learn more about the Advancing Cultural Evolution (ACE) initiative, see here. Deadline: Appli...
03037
Reposted by Paul Smaldino
Matt Clark 🌳🌄🏖️ @mattcscience.bsky.social · 15/09/2026
Paper out in Nature Sustainability today: Minimizing climate change adaptation trade-offs in African rangelands. See the open access article here: rdcu.be/uxjXoRTWqeAa Along with an accompanying press release: www.eurekalert.org/news-release...
163
Paul Smaldino @psmaldino.bsky.social · 11/09/2026
Whenever someone sends me an obviously AI-written email, I think so much less of them. A (tenured, R1) professor I know once told me they used AI to re-write all their emails, and my opinion of them has never recovered.
3181
Paul Smaldino @psmaldino.bsky.social · 11/09/2026
It's baffling how many "rah-rah AI" types seem to forget that (a) the process of solving a problem is often good for you, and (b) it's nice to have people around who have the experience of solving problems, (c) especially communities of such people.
0277
Reposted by Paul Smaldino
Roope Kaaronen @roopekaaronen.net · 31/08/2026
Really enjoyed this one. On "Tower of Babel" -like myths, Berezkin's mythology database claims to have dozens of such cases indexed. Not sure how carefully they have been vetted. :) Attached is one similar case I found when doing mushroom research.
Many thousands of years ago the inhabitants of the earth were all of one race and spoke but one language. Suddenly a fungus of enormous size made its appearance and continued to grow larger and higher every day and was looked upon by the people as a shelter from the sun and rain which had been sent them by the gods; but at last it grew to such a size that their crops, on which they depended entirely for food, suffered by being deprived of the blessings of the sun, rain, and dew, and they began to wish that they had stopped it's (sic) growth before. Sacrifices were offered to the gods who were prayed to remove the fungus from the face of the earth, but their prayers were without effect, and as time went on it became necessary for the preservation of life to cut it down whether the gods resented such action or not. So it was felled, cut up, and everybody eat [sic] of it with the result that they all fell into a kind of stupor and began to speak every man a different language, and the confusion was so great that they scattered over the face of the earth, and it was in this way that the many languages now spoken in the world originated.

—An Iban origin story from Borneo by Howell (1908, p. 78).
2113
Paul Smaldino @psmaldino.bsky.social · 30/08/2026
I’ve been considering starting to blog more seriously, like regular posts on topics I don’t have time to write full articles about. On the other hand, it feels like I’m 20 years too late for that medium. Do people even read blogs anymore?
5191
Reposted by Paul Smaldino
Not that other guy, that's for sure @neogliberal.bsky.social · 28/08/2026
Hofstadter would be proud. en.wikipedia.org/wiki/List_of...
en.wikipedia.org
List of lists of lists - Wikipedia
031
Reposted by Paul Smaldino
Elise Cutts @elisecutts.bsky.social · 24/08/2026
Writing this story was so unbelievably fun. And not only bc @mcxfrank.bsky.social says quotes like this: “Kids’ experience looks really radically different than we thought ... They’ve got these little short arms, so the objects are, like, right in front of them. And they live in a forest of knees.”
35111
Reposted by Paul Smaldino
Ehud @duhe.bsky.social · 24/08/2026
Many new followers! Welcome all. This means it is time to re-share the starter packs! go.bsky.app/H61xswq
2177
Paul Smaldino @psmaldino.bsky.social · 20/08/2026
All of the NSF’s directorates are awarding fewer new grants, but the hardest hit is the social, behavioural and economic sciences (SBE) directorate, which the White House proposed eliminating in its 2027 budget request to Congress. SBE has so far awarded 84 new grants this year, about 11% of its average, mainly in areas of artificial intelligence, cognitive neuroscience and decision-making. Much of its portfolio, such as sociology, archaeology, political science, economics and geography, has received zero new awards. “I don’t think they’ve realized yet that there’s no awards,” one NSF staff member says of researchers in those fields. “That’s going to be clear soon.”
095
Reposted by Paul Smaldino
Will Gervais @willgervais.com · 20/08/2026
looking for book recommendations, esp from my cultural evolution, critical 🧠, philosophy peeps: I'm thinking about *epistemic trust*, how we go about choosing to whom we defer on information. cool overlaps with learning, cultural evo, misinfo, etc. any cool books hitting this from diff directions?
684
Reposted by Paul Smaldino
NeoEonOne @neoeonone.bsky.social · 11/08/2026
An American interviewer asked Count Binface where he stands on the political spectrum.
9457151
Reposted by Paul Smaldino
Crow @abbyjane.cloverdalelane.com · 14/08/2026
I think about this a lot.
Tim Henke
@TimHenke9
eat shit, René Magritte
Translate Tweet
Mauv @ThatsMauvelous • 1d the machine refused to recognize my humanity until i professed to believe that a sign painted to look like a traffic light is indeed a traffic light.
Show this thread
Select all squares with traffic lights
7895082494
Reposted by Paul Smaldino
Josh Marshall @joshtpm.bsky.social · 12/08/2026
holy crap. the dystopia is just coming too fast and furious
56959275
Reposted by Paul Smaldino
Singularity's Bounty e/CC @catblanketflower.yuwakisa.com · 11/08/2026
I’m about 1/3 way through but this is fantastic
061
Reposted by Paul Smaldino
Joachim Vandekerckhove 🏖️ @joachim.cidlab.com · 11/08/2026
@psmaldino.bsky.social titlemogging us all
011
Paul Smaldino @psmaldino.bsky.social · 11/08/2026
New paper w/ @verwirrt.bsky.social and @lottybrand.bsky.social. We use agent-based modeling w/ NK landscapes to help theorize about role of analogies in language/cultural evolution, and how they solve problems associated with the transmission of complex information. www.cambridge.org/core/journal...
cambridge.org
Analogies evolve by increasing transmission fidelity in the communication of complex information | Evolutionary Human Sciences | Cambridge Core
Analogies evolve by increasing transmission fidelity in the communication of complex information - Volume 8
1448
Paul Smaldino @psmaldino.bsky.social · 11/08/2026
I haven't tried ResearchBox, but glad to see there's an alternative to OSF Projects.
150
Paul Smaldino @psmaldino.bsky.social · 07/08/2026
all dogs go to heaven except for those class traitors in the paw patrol
1241
Reposted by Paul Smaldino
Ronen Tamari @ronentk.me · 07/08/2026
Great thread by @shahanmemon.bsky.social Our current institutions are built in a way that discourages empathy and penalizes it. (eg the system selects for single minded type A personalities) We can create new institutions and tech to reward empathy and team science over individual competition >
3131
Reposted by Paul Smaldino
Ted Underwood @tedunderwood.com · 05/08/2026
Training a generative model to have taste is going to run into the basic problem that generative models are, definitionally, the wrong people. I can see why this will seem frustrating and perverse, if you believe human behavior ought to be rational. But, uh.
3475
Reposted by Paul Smaldino
Dominik Deffner @dominikdeffner.bsky.social · 10/07/2026
Learning from the most successful people makes sense? We show that social learning, and especially payoff bias, is bad when choice outcomes are dependent on prior success💰 As such "rich-get-richer" dynamics are everywhere, this shows fundamental boundary conditions for the benefits of SL!
13010
Reposted by Paul Smaldino
Paul Smaldino @psmaldino.bsky.social · 30/07/2026
A Demographic Theory of Similarity-Biased Social Learning. Now out in PNAS, led by the incomparable @apvelilla.bsky.social . We use modeling to explore conditions for the (cultural) evolution of parochial (and anti-parochial) learning biases. www.pnas.org/doi/10.1073/...
Humans adapt by learning from others, but risk acquiring maladaptive behaviors when learning from individuals facing different conditions. We present an evolutionary model exploring how individuals use social identity markers to select learning targets in diverse populations. Learners evolve biases that track reliable information sources: preferring similar individuals when in-group knowledge is adaptive, and dissimilar individuals when in-group behaviors are disadvantageous. Our framework demonstrates that this adaptive bias makes social learning viable even when it is costlier than individual learning. Additionally, we show that a minimum threshold of reliable cultural information is required for social learning to spread, providing a mathematical explanation for how demographic diversity drives population-level patterns of cultural segregation and assimilation.
03917
Reposted by Paul Smaldino
jessamyn @librarian.bsky.social · 31/07/2026
I work at a public library. People who want to use AI seem to have no trouble doing so. People who don't want to use AI have a harder time. I crowdsourced and then finalized this document "How to disable or avoid intrusive AI" and then gave it a short URL: notoai.org Please pass along if it's useful
An aircraft passenger oxygen mask: a drop down passenger mask with air bag and yellow plastic mouth and nose cover, oxygen tube has been cut; Demonstration model used by flight attendant crew for passenger instruction. Has text on the side indicating that it's non-functional.
193126057997
Paul Smaldino @psmaldino.bsky.social · 01/08/2026
If you’re interested in cultural evolution and digital humanities, Oleg is the guy.
180
Reposted by Paul Smaldino
Oleg Sobchuk 🇺🇦 @sobchuk.bsky.social · 31/07/2026
Reminder: two weeks are left to apply for the PhD and postdoc positions in my lab. See more info here www.aesthetics.mpg.de/en/career/jo...
Postdoc and PhD positions at MPIAE in Frankfurt
13535
Reposted by Paul Smaldino
John Lurie @johnlurie.bsky.social · 01/08/2026
This party sucks
632838
Reposted by Paul Smaldino
Gerry Carter @gerrycarter.bsky.social · 31/07/2026
Job posting: Associate Professor in behavioral ecology and cultural evolution within the Department of Ecology and Evolution (DEE) at the University of Lausanne. Deadline for applications is 30.09.2026: wwwfbm.unil.ch/releve/appli... (there is a button to switch to English at the top right)
wwwfbm.unil.ch
03047
Paul Smaldino @psmaldino.bsky.social · 30/07/2026
A Demographic Theory of Similarity-Biased Social Learning. Now out in PNAS, led by the incomparable @apvelilla.bsky.social . We use modeling to explore conditions for the (cultural) evolution of parochial (and anti-parochial) learning biases. www.pnas.org/doi/10.1073/...
Humans adapt by learning from others, but risk acquiring maladaptive behaviors when learning from individuals facing different conditions. We present an evolutionary model exploring how individuals use social identity markers to select learning targets in diverse populations. Learners evolve biases that track reliable information sources: preferring similar individuals when in-group knowledge is adaptive, and dissimilar individuals when in-group behaviors are disadvantageous. Our framework demonstrates that this adaptive bias makes social learning viable even when it is costlier than individual learning. Additionally, we show that a minimum threshold of reliable cultural information is required for social learning to spread, providing a mathematical explanation for how demographic diversity drives population-level patterns of cultural segregation and assimilation.
03917
Reposted by Paul Smaldino
Alejandro Pérez Velilla @apvelilla.bsky.social · 30/07/2026
Out now in PNAS. www.pnas.org/doi/10.1073/... Thank you to all peers and colleagues who provided invaluable feedback during the process!
pnas.org
A demographic theory of similarity-biased social learning | PNAS
We develop a demographic theory of similarity-biased social learning that formalizes our understanding of when and why individuals should preferent...
1189
Reposted by Paul Smaldino
Colin Carlson @colincarlson.bsky.social · 29/07/2026
🚨 New today in Nature 🦟 After decades of debate, we show that climate change has probably made malaria worse in sub-Saharan Africa, causing about 1 extra case per 1,000 children. But: malaria eradication efforts have pulled the other direction 200 times harder. 🔓 www.nature.com/articles/s41...
Graphical abstract for "The past and future impact of climate change on childhood malaria in Africa"
424695
Paul Smaldino @psmaldino.bsky.social · 25/07/2026
💯
0121
Reposted by Paul Smaldino
Richard McElreath 🐈‍⬛ @rmcelreath.bsky.social · 24/07/2026
oh nice to see this thread resurrected. dual (and more) life cycle organisms are so common. those of us who study vertebrates are studying some of the most boring animals ever to evolve on this earth
1559
Reposted by Paul Smaldino
Paul Gardner @ppgardne.bsky.social · 23/07/2026
@rnasociety.bsky.social is pretty good!
031
Reposted by Paul Smaldino
Damien Farine @damienfarine.bsky.social · 23/07/2026
(4) Proceeds go back to a society to support early career researchers (e.g. travel grants, small research grants, etc.)
071
Reposted by Paul Smaldino
American Naturalist / ASN 🐌 @asn-amnat.bsky.social · 22/07/2026
Happy you thought of us! Most issues of AmNat have articles that have published gratis where authors state that they do not have funding. Green OA (that's the self-archiving route) is supported with no additional cost.
071
Reposted by Paul Smaldino
Iban Dlank (b↔︎d) @ibandlank.bsky.social · 22/07/2026
Open Mind
0204
Reposted by Paul Smaldino
Torkild Hovde Lyngstad @torkildl.bsky.social · 22/07/2026
@sociologicalsci.bsky.social it is!
044
Reposted by Paul Smaldino
Kate Ozment @grubstreetwomen.bsky.social · 22/07/2026
Easy: @abojournal.bsky.social Fully OA. No fees. Best editors I've ever worked with.
093
Paul Smaldino @psmaldino.bsky.social · 22/07/2026
Academics: What's a journal in your field that's great? I feel like they are a dwindling breed. Criteria: (1) No APC. Supports green or diamond OA. (2) High-quality and relatively fast peer review. (3) Editors who provide real curational value and exercise purposeful agency in the decision process.
183513
Reposted by Paul Smaldino
Mike Frank @mcxfrank.bsky.social · 22/07/2026
Nearly four years ago we asked ourselves, "what would it look like to have a field-leading, completely free reference work for cognitive science"? It's been so fun editing OECS with @asifamajid.bsky.social and @hbaum.bsky.social. I can't believe we have published 200 (!!) articles! oecs.mit.edu
29734
Reposted by Paul Smaldino
Neil Lewis, Jr. @neillewisjr.bsky.social · 22/07/2026
So the U.S. has gotten itself into a situation where the State Department is now warning Americans about traveling...anywhere. "The Department of State advises Americans worldwide to exercise increased caution." travel.state.gov/en/internati...
travel.state.gov
521405561
Reposted by Paul Smaldino
Jonathan Slater @jonathanslater.bsky.social · 21/07/2026
Good morning Murmuration and Blue Sky
29098631538
Paul Smaldino @psmaldino.bsky.social · 22/07/2026
I really like this paper I did with @nathan-gabriel.bsky.social and @avbell.bsky.social, now out in EHS. It's an unusual paper because we tried to model the emergence of complex, multidimensional and intersectional identity structures from a signaling perspective. www.cambridge.org/core/journal...
The evolution of identity signals for co-ordination in diverse societies
Individual social identities indicate group affiliations and are typically associated with group-typical preferences, signals that indicate group membership, and the propensity to condition actions on the social signals of others, resulting in group-differentiated interaction norms. Past work modelling identity signalling and co-ordination has typically assumed that individuals belong to one of a discrete set of groups. Yet individuals can simultaneously belong to multiple groups, which may be nested within larger groupings. Here, we introduce the generalized Bach or Stravinsky game, a co-ordination game with ordered preferences, which allows us to construct a model that captures the overlapping and hierarchical nature of social identity. Our model unifies several prior results into a single framework, including results related to co-ordination, minority disadvantage, and cross-cultural competence. Our model also allows agents to express complex social identities through multidimensional signalling, which we use to explore a variety of complex group structures. Our consideration of intersectional identities exposes flaws in naive measures of group structure, illustrating how empirical studies may overlook some social identities if they do not consider the behaviours that those identities function to afford.Figure 1.
(a) Ancient Sumerian cities used throughout the paper as a motivating example. (b) Diagram of relationships between the different Mesopotamian identities along with shapes used to represent each of them throughout the paper.Figure 11.
Proportion of simulations that resulted in (a) the intersectional structure, optimal when 𝛼 =2, or (b) either of the two mere conjunction structures, optimal when 𝛼 =0. The trio of stick figures at the top represent the optimal strategy profiles used by non-Kishus in all cases.Acknowledgements
We thank the members of the MODSOC lab at UC Merced for helpful comments. We are grateful to the NSF for funding foundational research on social identity, inequality, and intersectionality.
0134