This book explores the psychological dimensions of migration, identity formation, and intragroup dynamics within global diaspora communities. By examining the mental and social processes that shape the experiences of ethnic minorities, this book, the first of a two-volume edited collection, offers a multidisciplinary perspective on the impact of migration and cultural adaptation. The book's central theme is that migration is not only a social and cultural phenomenon but a deeply psychological experience that shapes individuals' identities and group relations in complex and often challenging ways. The volume advances understanding of how migration affects psychological well-being, cultural identity, and both inter and intragroup relations, making a significant contribution to the field of migration studies and psychological research.