EVOLUTION THE MASTER-KEY 



would have given much in 1852, or Darwin in 1859. 

 We shall find comparative pathology the study 

 of disease in man and the lower animals; in com- 

 parative haematology the study of the blood of 

 man and the lower animals; and comparative 

 embryology the study of the developing forms 

 of man and the lower animals most cogent and 

 novel evidence for the theory of organic evolution. 

 Further, we must devote a chapter to the prac- 

 tical deduction from the theory which we owe 

 to Mr. Francis Galton, and which he has termed 

 eugenics or good breeding. This chapter should 

 justify my assertion that the discovery of organic 

 evolution profoundly affects human destiny; or, 

 rather, is capable of doing so to the lasting benefit 

 of men, so soon as they come not merely to hold 

 it as an article of intellectual faith, but as a fact 

 which is of practical significance capable of being 

 utilized in the highest interests of the race. 



