Book excerpt: First Published in 1994. The purpose of an encyclopedia is to gather in one place information that otherwise would be difficult to find. Bring together a collection of articles that are authoritative and reflect a variety of viewpoints. The contributors come from a wide range of disciplines— from nursing to medicine, from biology to history— and include sociologists, psychologists, anthropologists, political scientists, literary specialists, academics and non-academics, clinicians and teachers, researchers and generalists.