Since the fall of the Iron Curtain migration has become one of the major issues facing the new Germany. More than 20 million people have settled in Germany since the Second World War, yet officially Germany continues to consider itself a “non-immigration country.” One result of this is that neither coherent policies nor clear institutional channels to deal with the different aspects of migration have been developed. This book is firstly to establishes the fundamental economic, social, and security implications of this in-migration.