The history of one of the greatest revolutions that has ever been accomplished in human affairs–of a mighty impulse communicated to the world centuries ago, and whose influence is still visible on every side–and not the history of a mere party, is the object of my present undertaking. The history of the Reformation is distinct from that of Protestantism. In the former every thing bears the mark of a regeneration of the human race–of a religious and social change emanating from God himself. In the latter we too often witness a glaring degeneracy from first principles, the struggles of parties, a sectarian spirit, and the traces of petty individualities. The history of Protestantism may have an interest for Protestants only; the history of the Reformation addresses itself to all Christians, or rather to all mankind. The history of the Reformation is the history of one of the greatest outpourings of the life that cometh from God. May this work contribute to unite always more and more all those who are partakers of that Divine life.