THE OFFSPRING OF SCIENCE 



with another revolutionary instrument, by which 

 the unity of the farthest fixed star with the rest 

 of the universe was irrefutably demonstrated. 

 Ethnology, anthropology, and the comparative 

 study of languages clearly established the unity 

 of the human race. Natural science dominated 

 all human thought and even found its way into 

 political history in Buckle's " History of Civiliza- 

 tion." 



Once that the unity of all organisms in the 

 world had been established, two questions im- 

 mediately required an answer. One of them 

 concerned the unity of psychological phenomena, 

 the other that of life. 



If the physiological development of mankind, 

 animals, and plants knows no line of demarca- 

 tion, but only degrees of organization, and if 

 psychology is in reality a branch of physiology, 

 why should there be a line of demarcation be- 

 tween the psychological development of man, 

 animals, and plants? And if all organisms are 

 descended from some common primordial proto- 

 plasmatic form, then the discovery of the origin 

 of the vital processes of that form, or of any 

 form, would solve the question of all organic life 

 in the universe. 



The answer of science to both questions was 



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