Erasmus' controversies with French, Italian, Spanish, and German critics on theological, social, philological, educational, and other matters are contained in volumes 71-84 of the Collected Works of Erasmus. Volume 76 includes two of his most important disputes with Luther, A Discussion of Free Will and the first part of Hyperaspistes (usually translated as 'protector' or 'shield-bearer'). Erasmus writes in response to Luther's The Enslaved Will...