There is one unprecedented feature of our own post-Christian civilization which, in spite of being a rather superficial feature, has a certain importance in this connection. In the course of its expansion our modern Western secular civilization has become literally world-wide and has drawn into its net all other surviving civilizations as well as primitive societies. At its first appearance, Christianity was provided by the Graeco-Roman civilization with a universal state, in the shape of the Roman Empire with its policed roads and shipping routes, as an aid to the spread of Christianity round the shores of the Mediterranean. Our modern Western secular civilization in its turn may serve its historical purpose by providing Christianity with a completely world-wide repetition of the Roman Empire to spread over. We have not quite arrived at our Roman Empire yet, though the victor in this world may be the founder of it. But long before a world is unified politically, it is unified economically and in other material ways; and the unification of our present world has long since opened the way for St. Paul, who once travelled from the Orontes to the Tiber under the aegis of the Pax Romana, to travel on from the Tiber to the Mississippi to the Yangtse; while Clement’s and Origen’s work of infusing Greek philosophy into Christianity at Alexandria might be emulated in some city of the Far East by the infusion of Chinese philosophy into Christianity.