The book begins with a discussion of current classifications and definitions of armed groups as well as methodological approaches towards studying them. Chapter Two discusses armed groups from a historical and anthropological perspective. Chapter Three presents a critical analysis and interpretation of existing political perspectives on armed groups. The book concludes by introducing thenew theory. Challenging traditional methods of political theory and analysis while providing a solid introduction to the field, this Brief will be of use to researchers and scholars in political theory, international relations, political science, and anthropology, as well as to professionals in fields such as policing, counter-terrorism, and internal affairs.