The discovery of chlorpromazine 40 years ago and of other compounds for the specific treatment of psychiatric disorders had marked influence on clinical psychiatry and basic neuroscience. Since then, the development of psychopharmacology and theories of psychiatric disorders have become closely interrelated. On the occasion of the 70th birthday of Hanns Hippius - one of the pioneers of clinical psychopharmacology - leading experts in this field and related disciplines met to present and discuss their views and theories on psychiatric disorders. Future perspectives of drug development, genetic research in psychiatry, nosological and diagnostic concepts, and strategies for more specific treatment of various psychiatric disorders were presented. This was a unique occasion for most of the prominent and leading experts worldwide to contribute to this book. The reader is given broad insight into the research and clinical perspectives of psychiatry.