His wife, Sara, a psychologist who works with children with learning disabilities noticed something about her students: “The ones who know a lot about their families tend to do better when they face challenges.” The article went on to explain that “the more children knew about their family history, the stronger their sense of control over their lives, the higher their self-esteem and the more successfully they believed their families functioned.” In fact, the “How much do you know about your family?” scale turned out to be the best single predictor of children’s emotional health and happiness.