Protecting children from abuse and neglect would seem the first duty of any civil society.
But only in 1912 did the United States adopt its first child-protection laws, and not until 1967 were such laws on the books in every state.
Today, those early efforts sound almost quaint.
In 1967, for example, Pennsylvania required only doctors to notify authorities if they suspected a minor in their care was being abused or neglected.
In 1970, however, the legislature added teachers and nurses to its list of "mandated reporters." Four years later, it adopted the Child Protective Services Law, which expanded the definition of child abuse, greatly enlarged the list of those who must report it, and required the state and every county to create agencies tasked with responding to abuse reports.