How Darwinism Stands To-Day 391 



"Isolation" than Darwin did, meaning by "Isolation" all the 

 ways in which the range of intercrossing is restricted and close 

 in-breeding brought about. 



When we use the term Darwinism to mean, not his very 

 words, but the living doctrine legitimately developed from his 

 central ideas of variation, selection, and heredity, we may say 

 that Darwinism stands to-day more firmly than ever. It has 

 changed and is changing, but it is not crumbling away. It is 

 evolving progressively. 



This is only an "outline" of a great subject, and it is not 

 an article that he who runs can read. It is very important to 

 avoid dogmatism in regard to an inquiry which is still relatively 

 young. There was not much scientific evolutionism before Dar- 

 win's day. The writer has not concealed his opinion in regard 

 to such a question as the transmission of acquired characters, 

 but it is not suggested that this is the only possible opinion. It 

 may be recommended that readers to whom the subject is com- 

 paratively new, and to whom it appears full of uncertainties, 

 should write out their ideas in a definite way and then compare 

 them carefully with the relevant paragraphs in the article. It 

 is all too easy to go off on a wrong tack, and this should be 

 guarded against by patient study. For the problems of evolu- 

 tion are fundamental. 



BIBLIOGRAPHY 



The classic works of DARWIN, WALLACE, AND HUXLEY. 



BUTLER, Evolution Old and New (1878). 



CLODD, Story of Creation: a plain account of Evolution (1888). 



CONKLIN, Heredity and Evironment in the Development of Men (1915). 



CONN, Evolution of To-Day (1886). 



CRAMPTON, The Doctrine of Evolution (1911). 



DENDY, Outlines of Evolutionary Biology (1912). 



GEDDES AND THOMSON, Evolution (Home University Library, 1911). 



HAECKEL, Evolution of Man. 



KELLOGG, Darwinism To-day (1907). 



