This volume investigates the historical development, geographical distribution, and contemporary status of the world's major religious traditions. Ninian Smart, a prominent scholar in religious studies, coordinates a team of experts to synthesize complex theological and historical data into a structured visual framework. The text utilizes a multidisciplinary approach, combining cartography, historical analysis, and sociological observation to map the evolution of faith systems across global civilizations.

Experts and scholars frequently cite this work as a foundational visual reference for students and researchers of comparative religion. Readers often note the clarity of the cartographic data and the accessibility of the scholarly contributions.