THE STUDY OF SEX 19 



maturity and the climacteric. The more 

 general Natural History study passes insen- 

 sibly into psychological inquiries as to the 

 sexual impulses, instincts, and emotions, 

 as to the rise and progress of that human 

 complex which we call " love " ; and thence, 

 alas, into its pathology also. 



In our insistence on the fundamental neces- 

 sity of the biological approach apart from 

 which human nature cannot be rightly under- 

 stood we are far from falling into the fallacy 

 of forgetting that the biological interpretation 

 requires to be supplemented by the psycholo- 

 gical and the social. We wish to make our 

 position in this respect quite clear. Through 

 and through, and back to the ovum, Man is 

 a mammal, with a mammal's structure and 

 functions, development and pedigree, with a 

 mammal's strength and weaknesses. Truly, 

 " all flesh is not the same flesh, but there is 

 one kind of flesh of men, another flesh of 

 beasts, another of fishes, and another of 

 birds," there is specificity through and 

 through; yet there is a common ground of 

 protoplasm that makes the whole world kin ; 

 and Man cannot disown his mammalian 

 ancestry. He is solidary with the animal 

 creation and with mammals in particular. 



On the other hand, while Man still has his 

 feet, as it were, in the natal mud, he has 

 hitched his wagon to a star. With his power 

 of rational discourse, his awareness of his 

 own history, and his capacity for controlling 

 his conduct in relation to general ideas and 

 ideals, he is able to pass far beyond animal 

 confines. Therefore we have sympathy with 



