294 C. G. CAMPBELL 



ened race, which medical science itself might not to be able to avert or to 

 overcome. 



No one would be warranted in thinking that medical science is as yet, or 

 perhaps ever will be, in position to ward off the sudden assault of a. virulent 

 infection on a race of lowered vitality and resistance. Indeed unless a race 

 by its own folly took some other short cut to its doom, the gradual lowering 

 of its physical vitality and resistance would seem to be almost the greatest 

 menace to its survival. Hence if medical science does not address itself 

 equally to sustaining and building up the physical factors that lead to race 

 survival, as well as to individual palliation and relief, it promises to dimin- 

 ish, rather than to augment, the racial prospect for survival. 



