350 PROBLEMS OF HUMAN EVOLUTION 



northern climate, and as a state cannot be strong unless its 

 citizens are physically vigorous, history will repeat itself and the 

 most advanced nations will have to submit to others less enervated 

 and bequeath their civilisation to them, unless a means of 

 checking the evil is found. The only possible means would 

 seem to be a further development of moral principle. 



