Diagnosed with attention deficit hyperactivity disorder, oppositional defiance disorder, and pervasive developmental disorder in the early 1990s, Robert Stevens was an exceptionally intelligent child who could not function in a mainstream environment. Being the “problem child” of every play group, sports league, and extracurricular activity he joined, Robert had no friends, no internal means of self-control, no “off switch,” and—as his parents, Robert and Catherine Stevens, were warned—per...