Harvard Study Analyzes Genetic Selection in Ancient West Eurasian DNA Spanning 10,000 Years

David Reich’s genetics lab at Harvard published a report titled 'Ancient DNA reveals pervasive directional selection across West Eurasia' in 2026, detailing ongoing human evolution in Europe and the Middle East over the last 10,000 years with significant effects.

The report documents genetic changes in these regions over the past 10,000 years, building on prior research into human adaptation. The findings were covered in various outlets, noting the interplay between cultural developments and genetic adaptations in the region.

Conducted as a genome-wide association study (GWAS), the research indicates West Eurasians have increased or reduced vulnerability to leprosy, rheumatoid arthritis, bipolar disorder, schizophrenia, coeliac disease, and gout. The analysis identifies selection pressures related to traits such as skin pigmentation, hair color, cognitive-related genes, and conditions like male-pattern baldness, among others.

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005 as goals for statistical significance in data-limited disciplines. The study increased sample size 14-fold through 10,016 ancient individuals with new data, yielding a combined dataset of 15,836 people spanning 18,000 years. The final dataset included 8,074,573 SNPs on chromosomes 1–22 and 1,665,051 insertions or deletions (indels) on chromosomes 1–22.

ZeroHedge reported the Reich lab’s research depended on data from 10,016 ancient individuals obtained through archaeological work. The article was authored by David Randall, Director of Research at the National Association of Scholars, and posted by Tyler Durden on 2026-04-22. There are moratoria on using American Indian biological data for gene samples in the United States.

Legal, regulatory, and cultural inhibitions limit the use of American Indian genetic and paleogenetic data in the United States.