Anabaptism "arose out of Reformed congregationalism", and Dutch Anabaptism was formed by "Social unrest and the apocalyptic visions of Melchior Hoffman". As examples of how the Anabaptist movement was influenced from sources other than the Swiss Brethren movement, mention has been made of how Pilgram Marpeck's of 1542 was deeply influenced by the of 1533 by Münster theologian Bernhard Rothmann. Melchior Hoffman influenced the Hutterites when they used his commentary on the Apocalypse shortly after he wrote it. Others who have written in support of polygenesis include and Walter Klaassen, who established links between Thomas Müntzer and Hans Hut. In another work, Gottfried Seebaß and Werner Packull showed the influence of Thomas Müntzer on the formation of South German Anabaptism. Similarly, author Steven Ozment linked Hans Denck and Hans Hut with Thomas Müntzer, Sebastian Franck, and others. Author Calvin Pater showed how Andreas Karlstadt influenced Swiss Anabaptism in various areas, including his view of Scripture, doctrine of the church, and views on baptism. Several historians, including Thor Hall, Kenneth Davis, and Robert Kreider, have also noted the influence of Humanism on Radical Reformers in the three originating points of departure to account for how this brand of reform could develop independently from each other. Relatively recent research, begun in a more advanced and deliberate manner by Andrew P. Klager, also explores how the influence and a particular reading of the Church Fathers contributed to the development of distinctly Anabaptist beliefs and practices in separate regions of Europe in the early 16th century, including by Menno Simons in the Netherlands, Conrad Grebel in Switzerland, Thomas Müntzer in central Germany, Pilgram Marpeck in the Tyrol, Peter Walpot in Moravia, and especially Balthasar Hubmaier in southern Germany, Switzerland, and Moravia. Apostolic succession Baptist successionists have, at times, pointed to 16th-century Anabaptists as part of an apostolic succession of churches ("church perpetuity") from the time of Christ. This view is held by some Baptists, some Mennonites, and a number of "true church" movements. The opponents of the Baptist successionism theory emphasize that these non-Catholic groups clearly differed from each other, that they held some heretical views, or that the groups had no connection with one another and had origins that were separate both in time and in place. A different strain of successionism is the theory that the Anabaptists are of Waldensian origin. Some hold the idea that the Waldensians are part of the