INTRODUCTION 3 



*' blood," expresses the innate equipment of the indi- 

 vidual. It is what he actually is even before birth. 

 It is his nature. It is what determines whether he 

 shall be a beast or a man. Consequently in the 

 diagram (Fig. 1), the triangle of life is represented 

 as resting solidly upon the side marked "heritage" 

 for its foundation. 



Environment and training, although indispensable, 

 are both factors which are subsequent and secondary. 

 Environment is what the individual has, for example, 

 housing, food, friends and enemies, surrounding aids 

 which may help him and obstacles which he must 

 overcome. It is the particular world into which he 

 comes, the measure of opportunity given to his 

 particular heritage. 



Training, or education, on the other hand, repre- 

 sents what the individual does with his heritage and 

 environment. Lacking a suitable environment a 

 good heritage may come to naught like good seed 

 sown upon stony ground, but it is nevertheless true 

 that the best environment cannot make up for 

 defective heritage or develop wheat from tares. 



The absence of sufficient training or exercise even 

 when the environment is suitable and the endowment 

 of inheritance is ample will result in an individual 

 who falls short of his possibilities, while no amount 

 of education can develop a man out of the heritage 

 of a beast. Consequently the biologist holds that, 

 although what an individual has and does is un- 

 questionably of great importance, particularly to the 

 individual himself, what he is, is far more important 



