The main proponent of the Reformation in Switzerland was Huldrych Zwingli, whose actions during the Affair of the Sausages are now considered to be the start of the Reformation in Switzerland. His own studies, in the renaissance humanist tradition, had led him to preach against injustices and hierarchies in the Church already in 1516 while he was still a priest in Einsiedeln. When he was called to Zürich, he expanded his criticism also onto political topics and in particular condemned the mercenary business. His ideas were received favourably, especially by entrepreneurs, businessmen, and the guilds. The first disputation of Zürich of 1523 was the breakthrough: the city council decided to implement his reformatory plans and to convert to Protestantism.