And yet, admirable as is M. Cumont's presentation in _The Mysteries of Mithra_ and _The Oriental Religions_, nothing is a greater mistake than to suppose that his popularizations are facile reading. The few specialists in ancient religions may indeed sail smoothly in the current of his thought; but the very nature of a subject which ramifies so extensively and so intricately into the whole of ancient life, concerning itself with practically all the manifestations of ancient {vii} civilization--philosophy, religion, astrology, magic, mythology, literature, art, war, commerce, government--will of necessity afford some obstacle to readers unfamiliar with the study of religion. It is in the hope of lessening somewhat this natural difficulty of assimilating M. Cumont's contribution to knowledge, and above all, to life, that these brief words of introduction are undertaken. The presentation in outline of the main lines of thought which underlie his conception of the importance of the Oriental religions in universal history may afford the uninitiated reader a background against which the author's depiction of the various cults of the Oriental group will be more easily and clearly seen. M. Cumont's work, then, transports us in imagination to a time when Christianity was still--at least in the eyes of Roman pagans--only one of a numerous array of foreign Eastern religions struggling for recognition in the Roman world, and especially in the city of Rome. To understand the conditions under which the new faith finally triumphed, we should first realize the number of these religions, and the apparently chaotic condition of paganism when viewed as a system. "Let us suppose," says M. Cumont, "that in modern Europe the faithful had deserted the Christian churches to worship Allah or Brahma, to follow the precepts of Confucius or Buddha, or to adopt the maxims of the Shinto; let us imagine a great confusion of all the races of the world in which Arabian mullahs, Chinese scholars, Japanese bonzes, Tibetan lamas and Hindu pundits should all be preaching fatalism and {viii} predestination, ancestor-worship and devotion to a deified sovereign, pessimism and deliverance through annihilation--a confusion in which all those priests should erect temples of exotic architecture in our cities and celebrate their disparate rites therein. Such a dream, which the future may perhaps realize, would offer a pretty accurate picture of the religious chaos in which the ancient world was struggling before the reign of Constantine."