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| Multiregional hypothesis | |
|---|---|
| Name | Multiregional hypothesis |
| Author | Milford H. Wolpoff, Alan G. Thorne, Xinzhi Wu |
| Date | 1980s |
| Discipline | Paleoanthropology |
Multiregional hypothesis The Multiregional hypothesis proposes that modern humans emerged through continuous regional evolution of Homo erectus populations across Africa, Eurasia, and Australasia rather than from a single recent African origin. The model, articulated by scholars associated with the University of Michigan and the Australian National University, emphasizes gene flow, local adaptation, and deep population structure over the last million years. Proponents contrast their view with the Recent African Origin model articulated by researchers at institutions such as Harvard University and the Max Planck Society.
The Multiregional idea traces roots to early 20th‑century paleoanthropological syntheses by figures linked to University of Cambridge, University of Oxford, and the Smithsonian Institution, which debated the roles of regional continuity and replacement after discoveries at Java and Peking Man (Zhoukoudian). In the 1980s Milford H. Wolpoff at the University of Michigan, Alan G. Thorne at the Australian National University, and Xinzhi Wu promoted a formal multiregional framework responding to interpretations advanced by Richard Leakey and Chris Stringer associated with University College London and the Natural History Museum, London. Early disputes involved interpretations of fossils from Dmanisi, Sangiran, Sima de los Huesos, and Qafzeh alongside archaeological contexts from Olduvai Gorge, Koobi Fora, and Jebel Irhoud.
Multiregional proponents argue that Homo erectus dispersals from Africa beginning roughly one million years ago established interconnected regional populations in Europe, Asia, and Australia, where local continuity in morphology was maintained through persistent low‑level gene flow mediated by migration events tied to corridors such as the Sinai Peninsula and the Strait of Gibraltar. Mechanisms highlighted include recurrent admixture among populations studied by geneticists at University of California, Berkeley and paleontologists affiliated with Max Planck Institute for Evolutionary Anthropology, selection on regional traits observed in fossils from Dali, Fossil Lake, and Mungo Man (Lake Mungo), and structured population models comparable to frameworks used by demographic researchers at Princeton University and University of Chicago.
Supporters cite morphological continuities in crania, dentition, and postcranial remains reported from sites such as Zhoukoudian, Sangiran, Ngandong, and Skhul and Qafzeh that they interpret as regional retention of ancestral traits. Fossilists reference analyses by teams at the American Museum of Natural History and Australian Museum juxtaposed with early molecular studies from laboratories at University of Cambridge and Stanford University that initially yielded equivocal dates for divergence. Critics point to mitochondrial and nuclear DNA studies from groups at the Max Planck Society, University of Copenhagen, and Wellcome Sanger Institute that emphasize recent common ancestry and bottlenecks, while proponents reanalyze paleogenomic signals from sites like Denisova Cave and Neander Valley to argue for complex admixture rather than simple replacement.
The model emphasizes long‑term regional continuity invoked to explain morphological affinities between mid‑Pleistocene fossils and later Homo sapiens specimens in regions such as East Asia (e.g., Dali and Lantian), Europe (e.g., Atapuerca and Petralona), and Australia (e.g., Mungo). Advocates integrate concepts of population subdivision and metapopulation dynamics used by researchers at University of Oxford and University of California, Los Angeles to argue that gene flow across demes prevented complete speciation while allowing regional differentiation, an argument positioned against panmictic models advanced in work at Harvard Medical School and the Broad Institute.
Critics from teams led by Richard Lewontin, Chris Stringer, and Richard Leakey argue that the Multiregional hypothesis underestimates the explanatory power of the Recent African Origin model supported by mitochondrial Eve interpretations, Y‑chromosome studies, and whole‑genome analyses from institutions like the Max Planck Institute for Evolutionary Anthropology, Wellcome Trust Sanger Institute, and Broad Institute. Paleogenomic discoveries of admixture between modern humans, Neanderthals, and Denisovans reported by researchers at University of Leipzig and University of Adelaide complicate both models but are often framed as limited introgression into a predominantly African‑derived population. Methodological critiques arise from statisticians and population geneticists at University of Washington and Columbia University concerning calibration of molecular clocks and sampling biases in fossil collections curated by museums such as the Natural History Museum, London and the Smithsonian Institution.
Since the early 2000s, advances in ancient DNA, paleogenomics, and high‑precision dating by teams at institutions including the Max Planck Society, Wellcome Sanger Institute, Harvard University, and University of Copenhagen have led most researchers to favor a model combining recent African origin with limited regional admixture, often termed "leaky replacement" by scholars at University College London and Australian National University. Ongoing discoveries at Jebel Irhoud, Dmanisi, and Denisova Cave reported by collaborative teams from Morocco National Institute of Archaeology, Georgian National Museum, and the Russian Academy of Sciences continue to refine timelines and underscore roles for gene flow and population structure, keeping aspects of Multiregional thinking relevant within the broader consensus emerging from interdisciplinary projects involving Smithsonian Institution, Max Planck Institute for Evolutionary Anthropology, and major universities worldwide.