Within the past thirty years a painstaking literature has been produced by the descendants of the sixteenth century Anabaptists, mostly Mennonites, in an effort to replace the traditional European interpretation of Anabaptism as fanaticism beginning with the revolutionary mystic, Thomas Muentzer, and ending with the revolutionary polygamous debacle at Muenster in Westphalia ten years later. Thus were the Anabaptists discredited for centuries by Lutheran and Reformed theologians within the majority churches of Europe, the American Anabaptist historians say.