Evidence map›Paper›PMID 23077256›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2012

The great human expansion.

Brenna M Henn, L L Cavalli-Sforza, Marcus W Feldman

Open access · bronzeAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 159 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
159citing papers in PubMed, 2 pooled it
22.3field-weighted citation impact, top 1% of its field
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

159 citing papers in PubMed, 2 syntheses or guidelines pooled it, 409 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Review
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  12. Onset of extensive human fire use 50,000 y ago.Proceedings of the National Academy of Sciences of the United States of America · 2025
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  18. Range expansions across landscapes with quenched noise.Proceedings of the National Academy of Sciences of the United States of America · 2024
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99 more citing papers are in PubMed but not listed here.

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

3 authors at 1 institution in 1 country.

Brenna M HennDepartment of Genetics, Stanford University School of Medicine, Stanford, CA 94305, USA.
L L Cavalli-Sforza
Marcus W Feldman
Stanford University · US

Funding

Population Genetic Inferences From Dense Genotype DataR01HG003229 · NHGRI · CORNELL UNIVERSITY ITHACA · PI BUSTAMANTE, CARLOS DANIEL, CLARK, ANDREW G · 2004 to 2013
$4.8M
POPULATION GENETICS THEORYR01GM028016 · NIGMS · STANFORD UNIVERSITY · PI FELDMAN, MARCUS W · 1985 to 2010
$2.5M
Miniaturized Integrated Genotyping MicrosystemsR01HG003329 · NHGRI · UNIVERSITY OF CALIFORNIA BERKELEY · PI MATHIES, RICHARD A · 2004 to 2008
$1.2M
NHGRI NIH HHS 3R01HG003229NHGRI NIH HHS HG003329NHGRI NIH HHS R01 HG003229NHGRI NIH HHS R01 HG003329NIGMS NIH HHS GM28016NIGMS NIH HHS R01 GM028016
6 · The paper itself

Abstract

Genetic and paleoanthropological evidence is in accord that today's human population is the result of a great demic (demographic and geographic) expansion that began approximately 45,000 to 60,000 y ago in Africa and rapidly resulted in human occupation of almost all of the Earth's habitable regions. Genomic data from contemporary humans suggest that this expansion was accompanied by a continuous loss of genetic diversity, a result of what is called the "serial founder effect." In addition to genomic data, the serial founder effect model is now supported by the genetics of human parasites, morphology, and linguistics. This particular population history gave rise to the two defining features of genetic variation in humans: genomes from the substructured populations of Africa retain an exceptional number of unique variants, and there is a dramatic reduction in genetic diversity within populations living outside of Africa. These two patterns are relevant for medical genetic studies mapping genotypes to phenotypes and for inferring the power of natural selection in human history. It should be appreciated that the initial expansion and subsequent serial founder effect were determined by demographic and sociocultural factors associated with hunter-gatherer populations. How do we reconcile this major demic expansion with the population stability that followed for thousands years until the inventions of agriculture? We review advances in understanding the genetic diversity within Africa and the great human expansion out of Africa and offer hypotheses that can help to establish a more synthetic view of modern human evolution.

Indexed as

Genome, HumanPopulation GrowthAfricaDemographyFounder EffectHuman MigrationHumansModels, Theoretical

Identifiers

PMID23077256
PMCPMC3497766
OpenAlexW2096014252

What OpenQuestion holds

Textmetadata
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.