This work investigates how prophetic literature functioned as a primary driver of political and religious discourse during the later Middle Ages. Marjorie Reeves, a distinguished historian of medieval thought, examines the circulation of Joachimite prophecies and their impact on the intellectual climate of the period. By analyzing a wide array of manuscripts and theological treatises, she argues that these apocalyptic visions were not merely fringe beliefs but central components of medieval political strategy and institutional reform. The book provides a rigorous framework for understanding how eschatological expectations shaped the actions of popes, monarchs, and reformers alike.

Scholars frequently cite this work as a foundational text for understanding the intellectual history of the later Middle Ages. Readers often note the academic density of the prose, which requires a strong background in medieval history to fully appreciate the nuanced arguments presented.