It's Not in Your DNA — On Mistaking Habit for Heredity
“It’s in my DNA” has become the all-purpose explanation for anything that repeats across a family or a civilization: a talent, a temperament, a taste for bread and wine, a tendency to slip on the same wet bar of soap three generations running. The phrase borrows the authority of genetics to describe something that is usually just a stable environment, a copied habit, or an unexamined tradition, and the borrowing is not innocent. Calling a pattern genetic quietly removes it from the category of things anyone chose, or could still change. …