The Crusades: The Authoritative History of the War for the Holy Land

by Thomas Asbridge

Now, he refined and extended that notion. Innocent hoped many thousands would enrol in his new campaign, but he announced that anyone taking the cross who proved unable to fight in person could readily redeem their crusading vow by making a cash payment and still receive a religious reward. This extraordinary reform may have been well intentioned–designed to bring the crusade both financial and military resources, and to extend the redemptive power of holy war to a wider audience, but it established an extremely dangerous precedent. The idea that spiritual merit could be bought with money spawned the development of a comprehensive system of indulgences, perhaps the most widely criticised feature of later medieval Latin Catholicism and a key factor in the emergence of the Reformation. These looming long-term consequences were not apparent in 1213, but, even so, Innocent’s innovation elicited scandalised criticism among some contemporaries and, in the course of the thirteenth century, led to grave abuses of the crusade movement.