Into the absorbingly interesting question of Half-castism as looked at from the scientific standpoint, it is not possible for us now fully to enter. This one thing is certain, that to the question, "What are the exact physiological, intellectual, and moral results which arise from the admixture of Aryan with Negroid or other non-Aryan races?" science has as yet no really definite answer to give. The whole question--one of the most vital and wide-reaching of those which lie before the human intellect for solution in the ages to come--is yet one the very hem of whose skirt science has not begun to raise. To obtain any really exact knowledge on the subject it would be necessary to carry on extensive experiments: to obtain large numbers of individuals of pure Aryan blood, of non-Aryan blood, and of mixed blood, and placing them in exactly identical conditions (not merely materially, but morally and emotionally), to exclude from them the knowledge of any tradition or history which might modify their development. If this were done it would then be possible, if the numbers were large enough to exclude individual variations, to determine exactly in how far the mixed creature was better, worse, different from, or like to either parent species. As, however, the human race is not likely to undertake such experiment during the next millennium, and as we have at present no such exact knowledge of the conditions which govern the laws of inheritance as would enable us to deduce the nature of offspring from the study of the two parent forms (our knowledge even with regard to animals being purely empirical on this point), we are obliged to fall back on cruder and less scientific methods.