In the meat of this book, the DSM anxiety disorders are discussed one by one. In each case, it is argued that the way in which DSM has drawn the boundaries of illness is flawed. Horwitz and Wakefield point out that DSM uses a hodge-podge of terms (e.g., “unreasonable,” “irrational,” or “excessive”) that all refer to whether the anxiety appears commensurate with the threat that the world actually presents to the patient. They are most vehement about social phobia and posttraumatic stress disorder, which they contend are being massively overdiagnosed. Space precludes me from here rehearsing their arguments. But in each case, they contend that DSM has ignored the fact that evolution has designed us to have anxieties that may be irrational by current standards (e.g., vicious felines, airplanes, tall buildings). Ignoring this fact, they argue, results in us being quite overinclusive in our diagnoses of anxiety disorders.