When does it become apparent that the treatment of our children is abusive?

Having watched the fascinating and disturbing Netflix documentary ‘Monsters Inside: The 24 faces of Billy Milligan’ I find it difficult to understand why in this modern era we are still hurting our children. The documentary charts the life of Milligan who, according to some psychiatrists, suffered from multiple personality disorder.  In 1977 Billy Milligan was accused of the se