SCIENCE AND PHILOSOPHY 127 



of its results. But it often strains at its self-made 

 leash. 



Let us take an example. It is the business of 

 the zoological evolutionist to discover what he 

 can in regard to the actual history of the various 

 races of animals. He has to discover, for instance, 

 if he can, the pedigree of Mammals. But his 

 task does not end there, he has to inquire into the 

 factors operative in this evolution arguing back 

 from what is known of the laws of variation and 

 heredity, selection and isolation. But the more 

 complete his description becomes, the more inevi- 

 tably, as it seems to us, is he led towards reflec- 

 tion on the evolution of Mammals as a particular 

 chapter in a great book. It cannot be torn out 

 and understood by itself. It came about after 

 preparations that we dimly descry being made in 

 the mist of millions of years ago. It came about 

 in a natural, predetermined fashion, and at a 

 particular stage in the history of other things, 

 such as the Earth itself. Moreover, it was part 

 of the preparation for the Supreme Mammal 

 Man himself. The evolution of Mammals, along 

 with the august process of which it was a part, 

 must here be seen in its larger significance it 

 led on even to the science which, in pursuing 

 this thought, transcends itself. 



TWOFOLD RELATION BETWEEN SCIENCE AND 

 PHILOSOPHY. (1) Those who take life easily, 



