One Side Has Definitively Won the Missing Heritability Debate (www.astralcodexten.com)

A recent study has sparked renewed debate in the ongoing "missing heritability" controversy, firmly asserting that genetic factors significantly contribute to various human traits, albeit with conflicting interpretations from researchers. Utilizing a groundbreaking technique called GREML-WGS, geneticists analyzed complete genomes from over 347,000 British participants, aiming to bridge the gap between twin studies—often suggesting traits are over 50% heritable—and molecular studies, which typically report much lower heritability figures around 10-20%. The key finding indicates that approximately 88% of the heritability gap can be accounted for by rare genetic variants, thus supporting the hereditarians' argument that many genetic influences were previously undetected due to their rarity. However, the implications remain contentious. While the hereditarians celebrate the substantial closure of the heritability gap, nurturists argue that the overall heritability figures, which hover around 30-40% for traits like IQ, still fall short of twin study estimates, suggesting that a significant portion of trait heritability may not be genetic. This intricate interplay of findings has left the scientific community divided on the interpretation of heritability, with both sides unwilling to concede ground, thereby ensuring that debates over the genetic underpinnings of complex human traits will continue.