Considering the limitations of psychology today, I discussed ways in which we can move beyond WEIRD (Western, Educated, Industrialized, Rich, and Democratic) psychology in a global collaborative manner and strengthen the links between basic and applied policy research. I also discussed the importance of historical psychology.
Many thanks to Joseph Henrich for the enthusiastic introduction.
I had a fun, far-reaching, free-ranging conversation about my research and research motivations with Kensy Cooperrider on Many Minds.
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Today’s episode is a conversation with Dr. Michael Muthukrishna, an Associate Professor of Economic Psychology at the London School of Economics.
Michael’s research takes on a suite of topics that all start from a single big question: Why are we so different from other animals? Part of the answer has to do with our neural hardware. There’s no question we’ve got big brains—and Michael has some cool things to say about why they may have gotten so big. But Michael is just as focused on our cultural software—the tools and ideas we develop, tweak, share, and accumulate over time. You might say he’s more impressed by our collective brains than by our individual brains. To study all this, Michael builds formal theories and computational models; he runs experiments; and he constructs and analyzes huge databases.
We cover a lot of ground in this episode. We talk about the finding that the size and interconnectedness of a social group affects the cultural skills that group can develop and maintain. We consider what actually powers innovation (hint: it’s not lone geniuses). We discuss how diversity is a bit double-edged and why psychology needs to become a historical science. And that, my friends, is hardly all—we also touch on cetaceans, religious history, and spinning plates.
I’ve been hoping to have Michael on the show for months now. His work is deeply theoretical, advancing the basic science of what it means to be human. But it’s also engaged with important practical issues—issues like corruption and cultural diversity. Without further ado, here’s my conversation with Dr. Michael Muthukrishna. Enjoy!
A transcript of this show will be available soon.
Notes and links
4:30 – An introduction to “dual inheritance theory.”
11:00 – A 2013 paper by Dr. Muthukrishna and colleagues about the relationship between sociality and cultural complexity.
12:15 – A paper on the loss of cultural tools and traditions in the Tasmanian case.
21:20 – A 2016 paper by Dr. Muthukrishna and Joseph Henrich on innovation and the collective brain.
28:30 – The original paper on the notion of cultural “tightness” and “looseness.”
30:20 – A recent short piece by Dr. Muthukrishna on the paradox of diversity.
34:50 – A 2019 popular piece of mine on the phenomenon of “global WEIRDing.”
40:27 – The so-called Flynn Effect refers to the puzzling rise of IQ scores over time. It is named after James Flynn, who died only weeks ago.
42:30 – A paper about the significance of Luria’s work on abstract reasoning in Uzbekistan.
50:26 – A paper on the “cultural brain hypothesis,” the subject of Dr. Muthukrishna’s dissertation.
51:00 – A paper on brains as fundamentally “expensive.”
58:00 – Boyd & Richardson, mentioned here, have authored a number of highly influential books. The first of these was Culture and the Evolutionary Process.
59:35 – A 2015 paper on head size and emergency birth interventions.
1:01:20 – The stylized model we mention here is discussed and illustrated in this lecture from the 2020 Diverse Intelligences Summer Institute.
1:03:15 – The paper by Dr. Muthukrishna and colleagues on cetacean brains and culture.
1:11:38 – The paper by Dr. Muthukrishna and colleagues on ‘Psychology as a Historical Science.’
1:14:00 – The 2020 paper by Dr. Muthukrishna and colleagues introducing a tool for the measurement of cultural distance.
You can keep up with Dr. Muthukrishna’s work at his personal website and on Twitter (@mmuthukrishna).
Many Minds is a project of the Diverse Intelligences Summer Institute (DISI) (https://www.diverseintelligencessummer.com/), which is made possible by a generous grant from the Templeton World Charity Foundation to UCLA. It is hosted and produced by Kensy Cooperrider, with creative support from DISI Directors Erica Cartmill and Jacob Foster, and Associate Director Hilda Loury. Our artwork is by Ben Oldroyd (https://www.mayhilldesigns.co.uk/). Our transcripts are created by Sarah Dopierala (https://sarahdopierala.wordpress.com/).
You can subscribe to Many Minds on Apple, Stitcher, Spotify, Pocket Casts, Google Play, or wherever you like to listen to podcasts.
We welcome your comments, questions, and suggestions. Feel free to email us at: manymindspodcast@gmail.com.
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This year’s Diverse Intelligences Summer Institute was held online due to the pandemic. I delivered a lecture over Zoom on “What affects our level of intelligence?” followed by a lively discussion with the students. The lecture discussed brain evolution, the Cultural Brain Hypothesis, collective brain, and a cultural evolutionary account of intelligence. You can watch it below:
I was invited to present my work on innovation and cultural evolution at the “Cultural Transmission and Social Norms Workshop” hosted by the School of Economics at The University of East Anglia, UK. I presented “Innovation in the Collective Brain: The Transmission and Evolution of Norms and Culture”, beginning with an introduction to cultural evolution for the audience of primarily economists. I then discussed innovation as a product of our “collective brains“.
I spent the last week back at Harvard University discussing research on cultural evolution and innovation with the Learning Innovations Laboratory (LILA), part of Project Zero at the Harvard Graduate School of Education. The LILA group include people from industry and the military. Every year the group invites two academics to discuss their research and how it might be applied to problems faced by members of the group. This year, Mary Ann Glynn and I were invited. It was an intellectually enriching opportunity to apply my work to current challenges in corporations and other organizations.
The ideas presented in my two talks were beautifully captured in the graphics below:
The Science of Cultural Evolution: What Makes Humans So Different
Sources of Innovation: The Secret of Human Success
I spent the last couple of days at a small conference on cumulative culture organized by Claudio Tennie and his two PhD students Elisa Bandini and Eva Reindl. The theme was “When and How does Cumulative Culture Emerge”. It was an excellent meeting – large enough to have a diversity of views, small enough to have interesting conversations with almost all participants.
To very briefly summarize, innovation is often assumed to be an individual endeavor driven by geniuses and then passed on to the masses. Consider Thomas Edison and the lightbulb or Gutenberg and the printing press. We argue that rather than a result of far-sighted geniuses, innovations are an emergent property of our species’ cultural learning abilities, applied within our societies and social networks. Our societies and social networks act as collective brains.
Innovations, large or small, do not require heroic geniuses any more than your thoughts hinge on a particular neuron.
We argue that rates of innovation are heavily influenced by:
sociality
transmission fidelity, and
cultural variance.
We discuss some of the forces that affect these factors. These factors can also shape each other. For example, we provide preliminary evidence that transmission efficiency is affected by sociality—languages with more speakers are more efficient.
We argue that collective brains can make each of their constituent cultural brains more innovative. This perspective sheds light on traits, such as IQ, that have been implicated in innovation. A collective brain perspective can help us understand otherwise puzzling findings in the IQ literature, including group differences, heritability differences, and the dramatic increase in IQ test scores over time.
