72 THE SCIENTIFIC EVIDENCES OF 



and this fact may justly be regarded as lending 

 much additional credence to the theory. 



Again, by observing that sympathy and the 

 social instincts generally a*-e developed to a 

 large extent in many of the lower animals, and 

 particularly so in the quadrumana, the theory 

 of natural selection is provided with a reasonable 

 basis for furnishing a scientific explanation of 

 the moral sense in man ; and by observing that 

 many of the lower animals are capable of draw- 

 ing simple inferences, the theory is likewise able 

 to explain the development of reason. So that 

 in the province of human psychology no less 

 than in that of animal, the theory of natural 

 selection, in showing itself competent to explain 

 much which is otherwise inexplicable, is seen 

 to derive a large additional measure of argu- 

 mentative support. 



4 



2. Although the majority of structures and 

 instincts met with in the animal kingdom are 



