Harvard researchers find recent human evolution was more active than thought
Updated
Updated · SciTechDaily · Apr 29
Harvard researchers find recent human evolution was more active than thought
8 articles · Updated · SciTechDaily · Apr 29
Using nearly 16,000 ancient and modern genomes from West Eurasia, the Nature study tracked genetic changes over 10,000 years and identified 479 strongly selected variants.
The team said selection intensified after farming emerged, affecting variants linked to immunity, pigmentation, metabolic disease and psychiatric risk, though directional selection explained only about 2% of observed genetic change.
Researchers said the methods and public dataset could be applied to other populations and species, while cautioning that modern trait labels such as income or education cannot explain ancient evolutionary pressures.
Why did beneficial ancient gene adaptations become risk factors for modern diseases?
Since farming reshaped our DNA, what modern innovations are now driving human evolution?
If culture now drives our genetics, are we becoming a self-domesticated species?
Mapping 479 Genetic Variants Under Strong Selection in West Eurasia Since the Agricultural Revolution
Overview
A landmark 2026 study led by David Reich and Ali Akbari analyzed DNA from over 15,000 ancient human remains, revealing 479 genetic variants that underwent strong natural selection in the last 10,000 years. This challenges the old belief that human evolution had slowed, showing instead that the pace accelerated, largely driven by the development of agriculture. Farming changed diets, increased population density, and exposed humans to new pathogens, creating powerful selective pressures, especially on immune system genes. Many of these adaptations came with trade-offs, increasing susceptibility to modern diseases like autoimmune disorders. The study highlights human adaptability and reshapes our understanding of evolution as an ongoing process.