PREFACE 

 TO THE REVISED EDITION 



IN reviewing the history of the doctrine of Evolution 

 during the ten years which have passed since this 

 book was first published, the conclusion is warranted 

 that the revolution effected by that doctrine has well- 

 nigh spent itself in so far as the demolition of 

 theories of special creations is concerned 



The overwhelming evidence of the unbroken 

 descent of all living things from the simplest 

 organisms ; and of the fundamental unity of struc- 

 ture in the apparatus of their minds as fully as the 

 apparatus of their bodies, in man and the higher 

 animals, narrows the enquiry to the operation of the 

 processes of Evolution in the realm of what is known 

 as intellect and spirit. The identity of the mechanism 

 being established, the question arises, Is the mind of 

 man different only in degree from that of the ape, 

 the dog, or the horse ? Or does he alone possess an 

 entity called the soul, which is in the body, but not 

 of it ? If this be so, it involves a series of breaks in 

 Evolution and of intervals in man's development 

 when, by supernatural intervention, he, the mortal, 

 is endowed with an immortal spirit. For this inter- 

 vention, which must have taken place millions of 



