five million earwigs collected at great expense from the surrounding country. Other belligerent governments will raise the plea of checking the spread of a hostile and dangerous culture; a plausible because apparently philosophical justification of war as the only means of extirpating a heresy that might pervert the whole future of European civilisation. Unfortunately such a moral effect, such a "conversion by shock," could only be accomplished by a very sudden, complete and shattering victory; and it is now beginning to be recognised that spectacular triumphs are not to be expected in modern warfare. But even if it were as possible by violence as it might conceivably be desirable to extirpate or even to limit the propagation of a particular form of mental culture, the achievement would certainly not be worth the cost to the unhappy survivors and their posterity. It would indeed be a crime against humanity to eliminate the better part of the younger generation, the flower of human brains, in the monstrous pedantry of attempting to correct an intellectual error. For the risks of modern warfare are not ordinary. It is not sufficiently realised that in six months of offensive tactics under modern conditions no man in the front line has more than one chance in a million of escaping death or mutilation. There may remain the plea that a prolonged campaign is necessary in order by exhaustion to compel the enemy to evacuate some territory that he may have wrongfully occupied. The inevitable answer to such a plea would be that if a war had arrived at a stage in which there was a clear possibility of coercing the enemy by a process of exhaustion, that possibility, if it were well-founded, would certainly not have escaped the intelligence of the enemy, who would consequently be prepared to save his face by coming to terms. The evacuation of the occupied territory, or whatever it is that was to be achieved by the coercive exhaustion of another year or two of battle, might then be obtained by negotiation at once, and at the cost of a certain amount of paper and ink, instead of being forced on a revengeful and embittered opponent by the expensive process of killing young men, a process which has the disadvantage of working both ways.