Parallel to events in Germany, a movement began in Switzerland under the leadership of Huldrych Zwingli (died 1531). These two movements quickly agreed on most issues, as the recently introduced printing press spread ideas rapidly from place to place, but some unresolved differences kept them separate. Some followers of Zwingli believed that the Reformation was too conservative, and moved independently toward more radical positions, some of which survive among modern day Anabaptists. Other Protestant movements grew up along lines of mysticism or humanism (cf. Erasmus), sometimes breaking from Rome or from the Protestants, or forming outside of the churches.