EVOLUTION THE MASTER-KEY 



than a manifestation of force, or power, or ener 

 gy, he framed a new dogma, which should express 

 this, the first synthesis, or &quot;placing together,&quot; of 

 the synthetic philosophy. He chose the word 

 force to express both the energy of motion and 

 the power manifested in matter, and he objected 

 to the word conservation as implying a conserver, 

 an act of conserving, and the necessity of this act, 

 lest force should disappear. Professor Huxley sug 

 gested to him the use of the word persistence ; and 

 thus the synthetic philosophy is founded upon the 

 dogma of the Persistence of Force. 



In this relation one may make reference to the 

 crudely materialist philosophy of Professor Haeckel, 

 of Jena, who is in the habit of using many Spen- 

 cerian ideas and terms in his popular perversions 

 of the philosophy which two great Englishmen, 

 Spencer and Darwin, have taught him, but whose 

 latest book, The Wonders of Life, does not contain 

 the name of his foremost master. Haeckel has 

 built what he apparently imagines to be an original 

 philosophy upon what he calls the law of substance. 

 This he has formed by the simple device of con- 

 bining the laws of the conservation of energy and 

 the conservation of matter, and calling that which 

 energy and matter express by the term substance, 

 used in the sense of Spinoza. The use of this word 

 I think most desirable and valuable, and I regret 

 that Spencer did not call his law the persistence 

 of substance (literally, of that which stands under 

 or sustains) ; but it is only just to observe that 



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