Friedrich D. E. Schleiermacher by Tod E. Jones Beginning in the late seventeenth century, as a reaction to a growing faith in the autonomy of human reason, Protestants were divided into two basic camps. On the one hand, there were the Christian enthusiasts. The widespread popularity of religious enthusiasm, which began from within the Evangelical (Lutheran) and Reformed (Calvinist) communions in the Netherlands and Germany, had by the early eighteenth century developed into a major fountain of Protestant influence, the Pietist movement. Springing up from the ministry of two Lutherans, Johann Arndt (1555-1621) and Philip Jacob Spener (1635-1705), Pietism emphasized the simple Christian life, personal devotion to the Redeemer, and the inner experience of the Holy Spirit. Its pre-Reformation roots can be traced to the work of Geert de Groote and Thomas à Kempis of the fourteenth and fifteenth centuries respectively. As a movement it refused to meet rationalism on its own terms, but insisted instead on a supra-rational basis of Christian truth. Although Pietism was an evangelistic movement, it was not apologetic. It extended the promise of spiritual discernment to the converted, but it was not prepared to make a defense to the unconverted. On the other hand, there were the Christian rationalists, who, in turn, can easily be subdivided into two distinct groups, the orthodox and the heterodox. The former argued that the truth of the Scriptures and, therefore, of the traditional Christian faith, could be defended on the basis of reason and empirical science. These were the ideological descendants of Wolff and Locke, apologists for the reasonableness of Christianity, and among them were the fundamentalists of their day. The latter type of rationalists were really not a group at all, but were instead a significant number-intellectuals and often professors, impressed with the ideas of Voltaire and Diderot or Toland and Tindal—who were each prepared to amend the Scriptures and formulate a highly individual credo in an attempt to salvage a more or less natural Christianity. Among these were the Christian Deists. Tod E. Jones, PhD, Š2004