Evidence map›Paper›PMID 30408028›Full record

ArticlePLoS computational biology2018

The Cultural Brain Hypothesis: How culture drives brain expansion, sociality, and life history.

Michael Muthukrishna, Michael Doebeli, Maciej Chudek, Joseph Henrich

Abstract read
In one paragraph

Article in PLoS computational biology, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
30citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

30 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Article
  3. Review
  4. Article
  5. Article
  6. The coevolution of cognition and sociality.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Review
  7. Article
  8. 3.3 million years of stone tool complexity suggests that cumulative culture began during the Middle Pleistocene.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  9. Article
  10. Article
  11. Article
  12. Multilevel cultural evolution: From new theory to practical applications.Proceedings of the National Academy of Sciences of the United States of America · 2023
    Article
  13. Article
  14. Article
  15. Bridging the Gap Between Believing and Memory Functions.Europe's journal of psychology · 2023
    Article
  16. Article
  17. Review
  18. Paradox of diversity in the collective brain.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2022
    Article
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors.

Michael MuthukrishnaDepartment of Psychological and Behavioural Science, London School of Economics and Political Science, London, United Kingdom.ORCID 0000-0002-7079-5166
Michael DoebeliDepartment of Zoology / Department of Mathematics, University of British Columbia, Vancouver, British Columbia, Canada.
Maciej ChudekSchool of Human Evolution and Social Change, Arizona State University, Tempe, Arizona, United States of America.
Joseph HenrichDepartment of Human Evolutionary Biology, Harvard University, Cambridge, Massachusetts, United States of America.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

In the last few million years, the hominin brain more than tripled in size. Comparisons across evolutionary lineages suggest that this expansion may be part of a broader trend toward larger, more complex brains in many taxa. Efforts to understand the evolutionary forces driving brain expansion have focused on climatic, ecological, and social factors. Here, building on existing research on learning, we analytically and computationally model the predictions of two closely related hypotheses: The Cultural Brain Hypothesis and the Cumulative Cultural Brain Hypothesis. The Cultural Brain Hypothesis posits that brains have been selected for their ability to store and manage information, acquired through asocial or social learning. The model of the Cultural Brain Hypothesis reveals relationships between brain size, group size, innovation, social learning, mating structures, and the length of the juvenile period that are supported by the existing empirical literature. From this model, we derive a set of predictions-the Cumulative Cultural Brain Hypothesis-for the conditions that favor an autocatalytic take-off characteristic of human evolution. This narrow evolutionary pathway, created by cumulative cultural evolution, may help explain the rapid expansion of human brains and other aspects of our species' life history and psychology.

Indexed as

Models, TheoreticalSocial BehaviorBrainCultural EvolutionHumansLearningPhylogeny

Identifiers

PMID30408028
PMCPMC6224031

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.