Was the Protestant reformation a radical challenge established to hierarchies

uring the Protestant Reformation, men like Martin Luther, John Calvin, and Ulrich Zwingli sought to reverse Catholicism's changes to Christian doctrine and end abusive practices such as the selling of indulgences. For centuries, groups within Western Christianity had objected to the heretical drift of the Roman Church and sought to correct it. Among these were the Anabaptists, a loose collection of reform-minded Christians within the church who greatly objected to doctrines such as infant baptism and a centralized church. As the Reformation continued, groups like the Anabaptists considered the steps taken by Luther, Calvin, and Zwingli to be insufficient. They pushed for even more drastic separation from Catholicism-not just Reformation, but "Radical Reformation."