The Spiritual Franciscans by David Saville Muzzey delves into the history of the Tuscan Spirituals and the Michaelists factions within the Franciscan order advocating for stricter adherence to the Rule of Saint Francis. The book explores the conflicts persecutions and theological debates that shaped the Franciscan movement in the 14th century. With references to papal decrees historical figures and internal struggles Muzzey unravels the complexities of the Spiritual Franciscans' defiance and the broader evolution of the order.