370 THE LAW OF EVOLUTION CONTINUED. 



ologists have found to be a law of organic development, is 

 a law of all development. The advance from the simple to 

 the complex, through a process of successive differentia- 

 tions, is seen alike in the earliest changes of the Universe 

 to which we can reason our way back, and in the earliest 

 changes which we can inductively establish; it is seen in 

 the geologic and climatic evolution of the Earth, and of 

 every single organism on its surface; it is seen in the evolu- 

 tion of Humanity, whether contemplated in the civilized 

 individual, or in the aggregation of races; it is seen in the 

 evolution of Society, in respect alike of its political, its 

 religious, and its economical organization; and it is seen in 

 the evolution of all those endless concrete and abstract pro- 

 ducts of human activity, which constitute the environment 

 of our daily life. From the remotest past which Science can 

 fathom, up to the novelties of yesterday, an essential trait 

 of Evolution has been the transformation of the homogene- 

 ous into the heterogeneous. 



§ 127. Hence the general formula arrived at in the last 

 chapter needs supplementing. It is true that Evolution, 

 under its primary aspect, is a change from a less coherent 

 form to a more coherent form, consequent on the dissipation 

 of motion and integration of matter ; but this is by no means 

 the whole truth. Along with a passage from the coherent 

 to the incoherent, there goes on a passage from the uniform 

 to the multiform. Such, at least, is the fact wherever Evo- 

 lution is compound; which it is in the immense majority of 

 cases. While there is a progressing concentration of the 

 aggregate, either by the closer, approach of the matter 

 within its limits, or by the drawing in of further matter, or 

 by both; and while the more or less distinct parts into 

 which the aggregate divides and sub-divides are severally 

 concentrating; these parts are also becoming unlike — un- 

 like in size, or in form, or in texture, or in composition, or in 

 several or all of these. The same process is exhibited by the 



