That heritability was estimated based on Danes born 1870-1900. It's likely that heritability has increased since then because there's less variability in the en

That heritability was estimated based on Danes born 1870-1900. It's likely that heritability has increased since then because there's less variability in the environment: health care has improved, there are fewer accidents, poor Danes are unlikely to be malnourished, etc. This study shows that heritability is basically zero below the age of 60, but increases a lot thereafter: https://link.springer.com/article/10.1007/s00439-006-0144-y https://link.springer.com/article/10.1007/s00439-006-0144-y