SOURCE: “The Further Development of the Popular Idea of Crusade” in The Origin of the Idea of Crusade, translated by Marshall W. Baldwin and Walter Goffart, Princeton University Press, 1977, pp. 269–305.
In the following essay, Erdmann analyzes the various elements—including religious and literary developments—that enabled the “general idea of crusade and war upon the heathen” to take the specific form of the Crusade to the Holy Land.
