Open Veils · Answer
Epigenetics and race
Epigenetics is the contested terrain where social-constructionist and hereditarian accounts of race collide. The emerging social-epigenomics field documents real, measurable biological differences between racialised populations in DNA methylation and epigenetic clock acceleration — but fiercely disputes their origin. The suppressed question is whether adversity-driven methylation changes can transmit across generations via genuine epigenetic inheritance, a mechanism the consensus systematically soft-pedals.
Evidence
- Michael Meaney's foundational work on maternal behaviour and glucocorticoid receptor methylation in rat offspring — widely cited but rarely followed to its human implications — established that environmental stress literally rewrites gene expression across generations.
- In the racial health disparity literature, researchers including Arline Geronimus developed the 'weathering hypothesis' — that chronic psychosocial stress associated with racialised environments accelerates biological ageing, now measurable via Horvath, PhenoAge and GrimAge epigenetic clocks.
- A September 2026 paper in ASSRJ explicitly cautions that 'current human evidence does not justify assuming that such effects are routinely transmitted through inherited epigenetic modifications,' attributing persistence to socioeconomic and neighbourhood continuity instead.
- Randy Jirtle's agouti mouse experiments demonstrated that nutritional and chemical exposures could alter coat colour and disease susceptibility through methylation, heritable without any DNA sequence change.
- These findings opened the door to what Bruce Lipton, in 'The Biology of Belief', frames as the collapse of genetic determinism: the environment upstream of the cell nucleus governs phenotype in ways classical genetics cannot account for.