In the sixteenth century the Church was confronted not only by official Protestantism, but by various other opposing bodies, Anabaptists, fanatics and anti-Trinitarians. If among all these only the Wittenberg, Zürich and Geneva groups “were able to assert themselves, this,” says a recent Protestant theologian, Paul Wernle, “was not due, or at least not solely due, to the fact, that they were more true or more profound than the others, but that they accommodated themselves better to existing conditions, and, above all, to the State.”[896] Karl Sell, a Protestant professor of theology, speaks in the same strain: “Where the Reformation gained the day it did so with the help of the secular power, of the Princes or republics and, in every instance, the Reformation itself strengthened the power of these authorities. Upon them devolved the new office of caring ... for religion.... Thus _the_ duty of providing for wholesome doctrine and right faith, for the doctrine which alone could be pleasing to God, became one of the principal concerns of the rulers; hence arose the strict adherence to orthodoxy, the exclusion of erroneous teaching from the confines of the State, in short, the theological police system which prevailed in all Protestant countries till the middle of the seventeenth century.”[897] The tendency to seek an alliance with the secular powers did not, however, hinder Luther from degrading the authorities and the Princes in the eyes of the people in the most relentless and public manner. In his mortification at the want of response to his call he allowed himself to be carried away to strictures and predictions which greatly excited the masses.