How we're learning the true prevalence of incest

Recent movements, and brave survivors, have helped to shine light on some of the abuses that happen behind closed doors. But there's one that is still rarely spoken of: Incest. For years the numbers cited on how common incest was in families were simply assumptions, but the age of voluntary genealogy tracing has led to a reckoning.

It's far more common than we ever imagined, and those voluntary tests are leading to some people finding out, in an awful way, that they were the children of incest. When they do, there's almost no resources for them to lean on, nowhere for them to turn. Almost...

GUEST: Sarah Zhang, staff writer at The Atlantic