Razib Khan's Unsupervised Learning Monologue: Race - genetics, history and sociology
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Apr 23, 2026 A deep monologue exploring the tangled meanings of race across genetics, history and sociology. It traces ancient observations, African origins, early population splits and out-of-Africa dispersals. It contrasts typological thinking with population genetics and explains how modern DNA markers and ancestry tests can classify geographic and population structure.
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Race Is A Constructed Classifier
- Race is a socially constructed classification rather than a fundamental natural kind.
- Razib Khan compares race to a table or species: useful human-made labels that organize real variation but are not elementary particles.
Lewontin's Result Doesn't Preclude Classification
- Lewontin's finding that most genetic variation is within groups was accurate for single loci but misleading for multi-locus classification.
- Razib Khan explains allezyme-era results (1970s) versus later multi-marker classifiers that can distinguish populations reliably.
A Few Hundred Markers Can Identify Ancestry
- With a few hundred highly variable markers, geneticists can classify continental and subcontinental ancestry with very high accuracy.
- Neil Risch and others showed early 2000s microsatellite/SNP work made classifiers routine for groups like African-American, Latino, and European.