There's a continued need for overarching and profound approaches to security. The con-cept of security needs to be thoroughly considered so that issues with an ever-increas-ing complexity and interconnectivity can be understood and dealt with. The nature of security and the various aspects of threats should be considered by examining different definitions of security. This book covers researches from different perspectives and disciplines upon migration by various experts. The contributors make different and rigorous analyses of all areas influenced by migration in order to be one of the new reliable source about the immi-gration studies with various dimensions.