SEX BIOLOGY AND PSYCHOLOGY 171 



be presented with the evidence for man's evolution 

 from lower forms, so it is good for the same reason 

 to give them an account of their psychological organ- 

 ization, including evidence for the role which sex 

 plays in the genesis of higher mental activities — with- 

 out, however, any necessity for psychological experi- 

 ments in burrowing into their own foundations. 

 In this case such knowledge would have the additional 

 value of putting them on their guard against allowing 

 themselves to be prejudiced by their own incom- 

 pletely-adjusted conflicts. 



We are all of us too prone to think that a phenom- 

 enon is somehow ' explained,' or interpreted better, 

 by analysing it into its component parts or discover- 

 ing its origin than by studying it in and for 

 itself. 



The new type of mental organization acquired 

 by man permits of wholly new types of mental process, 

 of a complexity as far exceeding those that we deduce 

 in brutes as does the physical organism of a dog or 

 an ant that of a polyp or a protozoon : and it is part 

 of our business to realize those possibilities to the 

 fullest extent. 



To sum up, then, biological investigation in the 

 first place shows us how certain abnormalities of 

 sexual psychology may be more easily interpreted 

 as caused by comparatively simple physical abnor- 

 malities than by the more complex distortions of 

 psychological origin dealt with by psycho-analysis. 



