Introduction-- 1. Ideas of power and authority during the disputes between Philip IV and Boniface VIII-- 2. Dante Alighieri: the approach of political philosophy-- 3. Marsilius of Padua-- 4. Power and powerlessness in the poverty debates-- 5. The treatment of power in juristic thought-- 6. The power crisis during the Great Schism (1378-1417)-- Conclusion-- Bibliography-- Index.