The advantages of our hypothesis (if its legitimacy be admitted) are obvious. In the first place, we have to deal with an actual demonstrable condition of the human intellect. The existence of the savage state in all its various degrees, and of the common intellectual habits and conditions which are shared by the backward peoples, and again the survival of many of these in civilisation, are indubitable facts. We are not obliged to fall back upon some fanciful and unsupported theory of what "primitive man" did, and said, and thought. Nay, more; we escape all the fallacies connected with the terms "primitive man". We are not compelled (as will be shown later)(1) to prove that the first men of all were like modern savages, nor that savages represent primitive man. It may be that the lowest extant savages are the nearest of existing peoples to the type of the first human beings. But on this point it is unnecessary for us to dogmatise. If we can show that, whether men began their career as savages or not, they have at least passed through the savage status or have borrowed the ideas of races in the savage status, that is all we need. We escape from all the snares of theories (incapable of historical proof) about the really primeval and original condition of the human family. (1) Appendix B. Once more, our theory naturally attaches itself to the general system of Evolution. We are enabled to examine mythology as a thing of gradual development and of slow and manifold modifications, corresponding in some degree to the various changes in the general progress of society. Thus we shall watch the barbaric conditions of thought which produce barbaric myths, while these in their turn are retained, or perhaps purified, or perhaps explained away, by more advanced civilisations. Further, we shall be able to detect the survival of the savage ideas with least modification, and the persistence of the savage myths with least change, among the classes of a civilised population which have shared least in the general advance. These classes are, first, the rustic peoples, dwelling far from cities and schools, on heaths or by the sea; second, the conservative local priesthoods, who retain the more crude and ancient myths of the local gods and heroes after these have been modified or rejected by the purer sense of philosophers and national poets. Thus much of ancient myth is a woven warp and woof of three threads: the savage donnee, the civilised and poetic modification of the savage donnee, the version of the original fable which survives in popular tales and in the "sacred chapters" of local priesthoods. A critical study of these three stages in myth is in accordance with the recognised practice of science. Indeed, the whole system is only an application to this particular province, mythology, of the method by which the development either of organisms or of human institutions is traced. As the anomalies and apparently useless and accidental features