> the heritability of every trait ever examined is vastly larger than the effect of the shared environment You're entirely misunderstanding heritability. Heri

> the heritability of every trait ever examined is vastly larger than the effect of the shared environment You're entirely misunderstanding heritability. Heritability is just the passing of traits to offspring, genetics may play a part in it, but likely a small part. Do children that read lots of books do so because their parents gave them good "book reading genes", or because they nurtured them in an environment where that was encouraged? Dawson illustrates this well with the heritability of tattoos. People are far more likely to get tattoos if their parents did, thus it is a heritable trait. According to your reasoning, the parents must have passed down a tattoo gene. Heritibility has as much (or more) to do with nurture than it has to do with nature.