Why and how did ADHD become the most commonly diagnosed mental disorder among children and adolescents, as well as one of the most controversial? Stimulant medication had been used to treat excessively hyperactive children since the 1950s. And the behaviors that today might lead to an ADHD diagnosis had been observed since the early 1930s as "organic drivenness," and then by various other names throughout the decades. Rick Mayes and colleagues argue that a unique alignment of social and economic trends and incentives converged in the early 1990s with greater scientific knowledge to make ADHD...