Sapiens: A Brief History of Humankind · chapter 8 · id sapiens-c8-02-there-is-no-biological-basis-f

“There is no biological basis for racial or caste hierarchies. These are purely cultural constructions imposed on biologically meaningless categories.”

holdsconfidence: high⚠ extracted by pipeline, re-audit pending

Receipts

Lewontin (1972), Evolutionary Biology 6:381-398DOI registry: valid

Approximately 85% of total human genetic variation exists within populations, with only ~15% between populations. The traditional concept of racial classification has no genetic basis.

Rosenberg et al. (2002), Science 298(5602):2381-2385DOI registry: valid

Genetic structure of human populations shows that within-population differences account for 93-95% of genetic variation. Genetic clusters correspond roughly to major geographic regions but are not discrete racial categories.

Moorjani et al. (2013), American Journal of Human Genetics 93(3):422-438DOI registry: valid

Caste endogamy in India began roughly 1,500-2,000 years ago, creating genetic structure through cultural practice rather than reflecting pre-existing biological differences.

This claim is a stable, citable object. If you can falsify a verdict, tell us — corrections are loud here.