The editors, Dr. Silverman of Florida International University and Dr. Treffers of the Leiden University Medical Center, have worked with the presenters at a May 1997 international research conference to produce a well-integrated volume. In addition to the 12 chapters based on presentations at the conference, they have included four others. One of the added chapters is a historical overview of how anxiety and its disorders in children and adolescents were viewed before the 20th century. In this chapter the editors remind us of the importance of societal factors in the appraisal of many clinical presentations.