In the early 16th century, attempts were made by the theologians Martin Luther and Huldrych Zwingli, along with many others, to reform the Church. They considered the root of corruptions to be doctrinal, rather than simply a matter of moral weakness or lack of ecclesiastical discipline, and thus advocated for God's autonomy in redemption, and against voluntaristic notions that salvation could be earned by people. The Reformation is usually considered to have started with the publication of the "Ninety-five Theses" by Luther in 1517, although there was no schism until the 1521 Diet of Worms. The edicts of the Diet condemned Luther and officially banned citizens of the Holy Roman Empire from defending or propagating his ideas.