AND ITS SELF-CONSERVATION". 283 



"descent of man" being mutually exclusive, those 

 hypotheses are in reality but different threads of the 

 same fabric of truth. 



Evidently, too, in case the several races of men orig- 

 inated separately in the manner above indicated, it would 

 seem extremely probable that the human type was realized 

 within some one more or less extended area long ages 

 before the actual development of that type in any other 

 area; the earlier development in the one region being 

 due, primarily, to gradual changes through which the 

 environment there became relatively more . stimulating 

 in the direction of mental activity. And it is not 

 wholly without significance in this connection that the 

 region in which the Aryan race has been found as far 

 back in time as it can be traced, is a region in which 

 such change in the environment actually took place. 

 If, indeed, we were to follow up the clew here pre- 

 sented, and to suppose that the Aryan race arose 

 through a Darwinian autochthon over the greater part 

 of the area which they have inhabited from the earliest 

 known period, we would also have in this hypothesis 

 the simple natural settlement of the controversy as to 

 whether this race was of Asiatic or of European origin. 

 And thus, as in so many other cases, the "either or" 

 would here prove to be but a restless, if not profitless, 

 oscillation between the two complementary aspects of 

 the one real truth. In such case, too, the "race" thus 

 originating would really develop as a race from the 

 gradual fusion of a multitude of tribes originally in 

 isolation, and of more or less contrasted characteristics, 

 the language of the most intellectual tribe gradually 

 becoming (with dialectic differences) the language of 



