The third volume of Henry Charles Lea's monumental study delves into the special fields of inquisitorial activity during the Middle Ages, focusing heavily on the internal dissensions of the Franciscan Order. The text examines the rise of the Spiritual Franciscans, who clung tenaciously to the ideal of absolute poverty established by St. Francis, and their inevitable clash with the Conventuals and the papacy. These ideological divisions were further complicated by the apocalyptic speculations of Joachim of Flora, whose prophecies of a third era of the Holy Ghost inspired both sublime devotion and revolutionary movements.
The narrative traces the emergence of mystical sects such as the Guglielmites and the Apostolic Brethren under Dolcino, whose armed resistance and tragic end highlighted the deep-seated social and spiritual unrest of the period. Lea meticulously details the theological battles fought over the poverty of Christ, particularly during the pontificate of John XXII, whose dogmatic definitions alienated the orthodox Franciscans and drove them into an alliance with Louis of Bavaria. Throughout the work, the author demonstrates how the Inquisition was utilized not merely to suppress heresy, but to enforce uniformity and crush any dissent challenging the absolute authority of the Holy See. The volume concludes with a comprehensive overview of the lingering remnants of spiritualism and political heresy, setting the stage for the inevitable Protestant Reformation.
