48 ADAMITES AND PREADAMITES.
time would suffice for the divergence of the Black races from the white man's Adam, since that would imply degeneracy of a racial and continental extent, and this is contrary to the recognized principle of progress in nature. At the same time I have assumed that the Mongoloid and Dravidian races may have descended from our Adam, both because the divergence in these cases is comparatively slight, and because those races, intellectually and morally, stand nearly on a level with our own. But I have not been satisfied with this assumption respecting the Brown races, because I do not think the Usher chronology affords sufficient time even for such a degree of differentiation. I admit the possibility; but I feel that the assumption is a strain upon the evidence.
What we need, then, to relieve us of this difficulty, is more time between Adam and the dawn of written history; and especially between Adam and the Deluge. But this is only one phase of the ethnological data which would be greatly accommodated and relieved by a larger allowance of time. The fourth chapter of Genesis, for instance, appears to have been composed before the Deluge—perhaps in the 5ooth year of Noah (Gen. v. 32); but at that time there were peoples in existence, descended from Cain, who were celebrated for agriculture, mechanics and music. They were indeed descended from Jabal, Jubal and Tubal-Cain, of the eighth generation from Adam. But, as the ten generations from Adam to the 5ooth year of Noah cover only 1,526 years, we may assume the eight generations to Tubal-Cain to cover about 1,245 years; and hence from Tubal-Cain to the 5ooth year of Noah we have only about 300 years, which is insufficient time, in the infancy of the world, for the growth of tribes and nations and culture which seem then to have been in existence.
Take another case. The tenth chapter of Genesis narrates a series of events which took place after the flood and before the division of the land in the time of Peleg. Computing the time in the usual way, the interval from the flood to the birth of Reu, the son of Peleg, was 131 years; and, according to the usual rate of increase, the posterity of Noah must have amounted to about 900 persons. This chapter was written in the time of Peleg, as otherwise the history would have been brought down to a later