Vlll PREFACE, 



energy is wasted in a serious endeavour to do so, even though 

 to minds already persuaded it may seem unnecessary to have 

 slain our opponents in a manner quite so mercilessly minute. 

 Secondly, I must ask these friendly critics to take note that, 

 although the discussion has everywhere been thrown into the 

 form of an answer to objections, it really has a much wider 

 scope : it aims not only at an overthrow of adversaries, but 

 also, and even more, at an exposition of the principles 

 which have probably been concerned in the " Origin of 

 Human Faculty." 



The Diagram which is reproduced from my previous work 

 on "Mental Evolution in Animals," and which serves to 

 represent the leading features of psychogenesis throughout 

 the animal kingdom, will re-appear also in succeeding instal- 

 ments of the work, when it will be continued so as to represent 

 the principal stages of " Mental Evolution in Man." 



i8, Cornwall Terrace, Regent's Park, 



July, 1888. 



