PREFACE 



The scope of the present work is scarcely so wide 

 as that of the writer's " Present Evolution of 

 Man." The author hopes he has profited by the 

 criticism and advice which he received on the 

 publication of his former work. Some preliminary 

 discussion of the general problem of evolution has 

 been necessary for the sake of the general reader, 

 but as much as possible of the technical material 

 has been banished to the Appendix. Thus, though 

 both the preliminary statement (the first five 

 chapters) and the Appendix are unusually long, as 

 compared to the main body of the work, yet the 

 way has been cleared for the full study of a 

 particular field of thought and human endeavour. 

 The fact that the preliminary statement contains 

 a little that is new may reconcile the biologist to 

 it. It is to be feared that nothing can reconcile 

 the general reader to the Appendix. However, 



