Human origins: a model with gene flow.
A population-genetic model explores interconnected ancestral populations rather than one isolated founding group.
Identify the model
A weakly structured stem for human origins in Africa is a specific population-genetic study. Its proposals are model-based inferences from genomic evidence. Nature ↗
Ask how the model was tested
Compare the sampled populations, assumptions, competing models, and measures of fit. The model’s ancestral groups are analytical constructs, not named historical peoples. Nature ↗
Keep identities separate
Genetic ancestry, language, religion, archaeological culture, and political identity require different evidence. A demographic model cannot establish all of them through one inferred relationship. Nature ↗