COSMIC PHILOSOPHY 



products of civilization," the law of organic 

 evolution here expounded is the law of all evo- 

 lution whatever. 



But the universality of this law admits of de- 

 ductive proof which may properly be adduced 

 while concluding this chapter, and before enter- 

 ing upon the long course of inductive verifica- 

 tion which comes next in order. Already we 

 have seen that the changes which primarily con- 

 stitute Evolution are necessitated by the rhythm 

 of motion, and therefore indirectly by the per- 

 sistence of force. We have now to show how 

 the secondary changes, differentiation and inte- 

 gration, are equally necessitated by the same 

 primordial fact. 



It is a corollary from the persistence of force, 

 " that, in the actions and reactions of force and 

 matter, an unlikeness in either of the factors 

 necessitates an unlikeness in the effects." When 

 the different portions of any homogeneous aggre- 

 gate are exposed to the action of unlike forces, 

 or to unequal intensities of the same force, 

 they are of necessity differently affected thereby. 

 Between the unequally exposed parts there arise 

 structural differences, entailing differences of 

 property and function. That which before was 

 homogeneoushasbecome heterogeneous through 

 the appearance of certain unlikenesses, — and, 

 under the name of differentiation, the rise of 

 such unlikenesses has already been described. 

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