This book investigates the fundamental nature of cooperation and competition as observed in both human and animal societies. Andrew M. Colman, drawing on his expertise in psychology and evolutionary biology, examines the biological and social underpinnings of these behaviors. The work presents a framework for understanding how these seemingly opposing forces shape social structures and individual interactions across species.

This work is positioned as a scholarly examination of fundamental behavioral science principles. Its focus on comparative analysis suggests a text aimed at students and researchers in psychology, zoology, and anthropology. The subject matter indicates a dense, analytical approach to understanding the roots of social behavior.