An example will make my meaning clear. A Celtic divinity, Epona,[5] was held in particular honor as the protectress of horses, as we all know. The Gallic horsemen worshiped her wherever they were cantoned; her monuments have been found scattered from Scotland to Transylvania. And yet, although this goddess enjoyed the same conditions as, for instance Jupiter _Dolichenus_ whom the cohorts of Commagene introduced into Europe, it does not appear that she ever received the homage of many strangers; it does not appear, above all, that druidism ever assumed the shape of "mysteries of Epona" into which Greeks and Romans would have asked to be initiated. It was too deficient in the intrinsic strength of the Oriental religions, to make proselytes. Other historians and thinkers of to-day prefer to apply the laws of natural science to religious phenomena; and the theories about the variation of species find an unforeseen application here. It is maintained that the immigration of Orientals, of Syrians in particular, was considerable enough to provoke an alteration and rapid deterioration in the robust Italic and Celtic races. In addition, a social status contrary to nature, and a bad political regime effected the destruction of the strongest, the extermination of the best and the ascendancy of the worst elements of the population. This multitude, corrupted by deleterious cross-breeding and weakened by bad selection, became unable to {26} oppose the invasion of the Asiatic chimeras and aberrations. A lowering of the intellectual level and the disappearance of the critical spirit accompanied the decline of morals and the weakening of character. In the evolution of beliefs the triumph of the Orient denoted a regression toward barbarism, a return to the remote origins of faith and to the worship of natural forces. This is a brief outline of explanations recently proposed and received with some favor.[6]