The book discusses a wide range of issues relating to the issue of ethnic expansion: the history and nature of expansion; ethnicity and its genesis; the phenomenon of ethnic migration, its labor and confessional aspects; ethnopsychological determinants of interethnic relations; expansion through conflict: conflict potential of the individual, ethnocratic conflicts, religious conflicts, terrorism. The book will be useful for sociologists, psychologists, conflictologists, political scientists, demographers, as well as everyone who is interested in the problems of ethnicity, geopolitics, etc.