The Controversy the Category Provoked

The Adiaphorist Controversy broke out in Germany after Lutheran forces lost the Schmalkaldic War in 1547, when the victorious Emperor Charles V pressed Lutheran territories to accept the Augsburg Interim, restoring a number of Catholic practices. Philipp Melanchthon and the Wittenberg theologians negotiated a compromise, the Leipzig Interim of December 1548, which accepted the return of certain rites, including extreme unction and confirmation, on the grounds that these were adiaphora, matters of indifferent form rather than substance, while insisting the core Lutheran doctrine of justification by faith be preserved, with the single word alone itself treated as one of the negotiable indifferent matters. Matthias Flacius Illyricus led fierce opposition to this compromise, arguing that accepting these concessions under political pressure and threat could never count as free, genuine indifference, since an adiaphoron accepted under coercion functions as a confession of defeat rather than as a neutral choice, a position later summarized in the phrase nothing is indifferent in a case of confession. The dispute split Lutheran theologians for years and was not resolved by theological argument so much as overtaken by politics, ending when the 1555 Peace of Augsburg recognized Lutheranism as a legally tolerated religion within the empire and removed the immediate pressure that had made the concessions necessary in the first place.