CONCLUDING REMARKS. 437 



tions in favor of the theory of Reversion, we have not 

 relied, for the Refutation of Darwinism, upon these 

 points alone. We have not left the theory of Rever- 

 sion dependent upon its mere agreement with the facts, 

 or sustained by a mere balance of probabilities; nor 

 have we counted, for its acceptance, upon the mere 

 fact that the law to which we look for an explanation 

 of the phenomena, and which alone is competent to 

 explain those phenomena, is a well-established scien- 

 tific factor, whose additional recommendation is that 

 it is assimilable to other well-known laws, such as that 

 of the reproduction of lost limbs, that of the redintegra- 

 tion of tissue, that of the repair of injuries, and all laws 

 whose operation is to restore the lost integrity of an 

 organism. 



Such considerations are amply competent to the 



mutable; and that each was evolved from a distinct, independent 

 center of inorganic forces. If such converse theory, or History of 

 Variations, be true, it is competent, also, to the refutation of the 

 whole of Herbert Spencer's synthesis, of Bain's hypotheses, and of 

 every theory of Biology, of Psychology, or of Sociology, which as- 

 sumes that those slight increments of development, known as Varia- 

 tions, may be accumulated indefinitely. 



But, although the converse theory of the Evolution of Species, is 

 not needed to the explosion of Darwinism, or other theory of general 

 evolution, — the question of whether or not these are true, being defi- 

 nitively settled by the phenomena of Variation, — a detail of the 

 modes of integration in which the several species were evolved from 

 independent" centers, is desirable on other grounds. Therefore, in' a 

 future work on The Special Evolution of Species, founded princi- 

 pally, if not exclusively, upon data furnished by Darwin, Bain and 

 Spencer, the evolution of species from independent centers; the 

 differentiation of organisms into sexual, neuter, and otherwise modi- 

 fied individuals-; the cause which determines the sex' of off- 



