This book investigates the complex relationship between William of Ockham's philosophical and theological ideas and the development of conciliar theory within medieval canon law. Brian Tierney, a distinguished historian of medieval political thought, examines how Ockham's critiques of papal authority and his theories of representation influenced the canonists' arguments for the supremacy of church councils. The work draws upon extensive archival research and a deep understanding of medieval legal and theological texts to present a nuanced argument about the intellectual underpinnings of conciliarism.

This scholarly work is recognized for its rigorous analysis of the intellectual history connecting Ockham and conciliar theory. Scholars in medieval history and canon law have noted Tierney's meticulous research and clear exposition of complex ideas. The book is considered a significant contribution to understanding the development of medieval political and ecclesiastical thought, particularly the challenges posed to papal absolutism.