This volume is a revised edition of The Evolution of Woman published by G.?P. Putnam’s Sons in 1894.  
In this later work much added evidence appears going to prove the correctness of the theory advanced in the former work. In it the subject of sex-development has been brought down to the present time and in this later investigation it is found that each and every fact connected with the biological and sociological development of the last twenty years is in strict accord not only with the facts set forth in The Evolution of Woman but with the conclusions therein arrived at.
 
In the concluding chapters of this volume the results of the separate development of the two diverging lines of sex demarcation are set forth. I have endeavoured to show that present conditions are the legitimate outcome of the ascendency gained during the later ages of human history by the egoistic or destructive agencies over the higher or constructive forces developed in human nature.
 
E. B. G.