Last year offered plenty of moments to have a sustained national conversation about child sexual abuse: the Jerry Sandusky verdict, the BBC's Jimmy Savile, Horace Mann's faculty members, and a slew of slightly less publicized incidents. President Obama missed the opportunity to put this issue on his second-term agenda in his inaugural speech.

Child sexual abuse impacts more Americans annually than cancer, AIDS, gun violence, LGBT inequality, and the mortgage crisis combined—subjects that Obama did cover.

Had he mentioned this issue, he would have been the first president to acknowledge the abuse that occurs in the institution that predates all others: the family. Incest was the first form of institutional abuse, and it remains by far the most widespread.

Here are some statistics that should be familiar to us all, but aren't, either because they're too mind-boggling to be absorbed easily, or because they're not publicized enough. One in three-to-four girls, and one in five-to-seven boys are sexually abused before they turn 18, an overwhelming incidence of which happens within the family. These statistics are well known among industry professionals, who are often quick to add, "and this is a notoriously underreported crime."