The scope of this handy one-volume guide to modern thought is broad, ranging from the lastest developments in astrophysics to recent trends in the arts. Some areas, such as anthropology, recent world history, critical theory, economics, philosophy, music, medicine, and the psychological disciplines, have been substantially enlarged. The entries are liberally cross-referenced, offering the reader ease of access at a range of levels with the intention of making this the single most useful reference tool for those whose curiosity takes them outside their own area of competencee.