were taken as officers, particularly in the aviation corps. There should have been more men employed as officers who had demonstrated the necessary qualifications, as foremen and others accustomed to boss gangs of men.
(b) The burden was thrown too heavily on the old white Americans, by the exemption of aliens, who make up a large part of the population in some states. There were communities in New England which actually could not fill their quotas, even by taking every acceptable native-born resident, so large is their alien population. The quota should have been adjusted if aliens were to be exempt.
(c) The district boards were not as liberal as was desirable, in exempting from the first quota men needed in skilled work at home. The spirit of the selective draft was widely violated, and necessitated a complete change of method before the second quota was called by the much improved questionnaire method.
It is difficult to get such mistakes as these corrected; nevertheless a nation should never lose sight of the fact that war is inevitably damaging, and that the most successful nation is the one which wins its wars with the least possible eugenic loss.
Leaving the period of preparedness, we consider the period of open warfare. The reader will remember that, in an earlier chapter, we divided natural selection into (1) lethal, that which operates through differential mortality; (2) sexual, that which operates through differential mating; and (3) fecundal, that which operates through differential fecundity. Again, selection operates both in an inter-group competition and an intra-group competition. The influence of any agency on natural selection must be examined under each of these six heads. In the case of war, however, fecundal selection may be eliminated, as it is little influenced. Still another division arises from the fact that the