and psychoanalysis, a visitor from Mars could make little sense of much of contemporary America. He would fail to understand the cartoons of Jules Feiffer, the movies of Woody Allen, the nov- els of D. M. Thomas or Philip Roth. His grasp of U.S. politics, ed- ucation, and criminal justice would be incomplete. Psychiatry in America today is, one estimate, a $20-billion-a-year indus- try. As a professional field, it is also unkempt and overgrown, with no regular boundaries. Practitioners cannot always...