In the spring of 1982, Susan Burton turned to alcohol and drugs to cope with the death of her 5-year-old son, who had run into the street and was hit by a vehicle driven by an off-duty police officer . Over the course of the next 17 years, Burton was in and out of prison. “Each time I left, I felt a little more broken,” she told me recently. What would have made a difference, she said, was “if there could have been a way to have therapy from traumatic childhood events, disappointments and...