Pietism is increasingly recognized as the most important movement in Protestant Christianity since the Reformation of the sixteenth century. Simply put early Protestant reformers were concerned with reforming the doctrine and beliefs of Christians whereas the Pietiest leaders were concerned with reforming the lives and behavior of Christians. This coupled with other disagreements led to calls for separation which in turn gave rise to the movement best described as radical Pietism. German Radical Pietism introduces the English reader to the research of the major contemporary scholar of radical Pietism Hans Schneider. Originally appearing in the comprehensive study of the history of Pietism that appeared in the 1990s Schneiders research considers historical treatment of the major figures movements and ideas of the radical wing of German Pietism in the seventeenth and early eighteenth centuries. These developments are set in their historical and social contexts thereby providing the first definitive treatment in English of this movement as a whole.