This book by Jonathan Turner and Anthony Roberts proposes a new theoretical approach for explaining the dynamics of inter-societal systems. The authors argue that inter-societal systems have existed since the beginning of human societies and the dynamics of these systems are a fundamental property of the social universe. However, while world-systems analysis has emphasized this latter point, the authors argue the reluctance to theorize complex abstract models and systems of explanatory propositions on the dynamics driving inter-societal systems hinders scientific explanation of inter-societal dynamics. In this context, the authors critically look at contemporary theorizing and review key theories that have been developed to explain geo-economic, geo-political, and geo-cultural dynamics, from the classic period through present-day world-systems analysis and cliometrics. The book summarizes these theories clearly, emphasizing their strengths and weakness, finally developing a theoretical synthesis through new models and propositions on the dynamics of premodern and modern inter-societal systems. Professor Turner's decades of experience writing theory books for undergraduates have ensured that this book presents abstract ideas clearly and with examples so that students can understand the arguments. This book is a must-read for all social theory researchers, academics, serious undergraduate students, graduate students, and interested laypersons.