"All the able-bodied men between the ages of nineteen and forty-five are in the ranks. But the older men do not take many chances with death.... These European conscript armies are arranged in classes according to age, and the younger classes are the men who do most of the actual fighting. The men in their late thirties or their forties, the 'territorials,' guard the lines, garrison the towns, generally attend to the business of running up the supplies. When we come to gather the statistics of this war we shall find that an overwhelming majority of the dead were less than thirty years old, and probably that the majority were under twenty-five. Now, the territorial of forty or forty-five has usually given to the state as many children as he is going to give, while the man of twenty-five or under has usually given the state no children at all."[103] Mr. Irwin was gauging the racial cost by the criterion of youth. A leading English scholar, Mr. H. A. L. Fisher, obtained equally alarming results by applying the test of genius. He analyzed the casualty lists "filled with names which, but for the fatal accidents of war, would certainly have been made illustrious for splendid service to the great cause of life.... A government actuated by a cold calculus of economic efficiency would have made some provision for sheltering from the hazards of war young men on whose exceptional intellectual powers our future progress might be thought to depend. But this has not been done, and it is impossible to estimate the extent to which the world will be impoverished in quality by the disappearance of so much youthful genius and talent.... The spiritual loss to the universe cannot be computed, and probably will exceed the injury inflicted on the world by the wide and protracted prevalence of the celibate orders in the Middle Ages."[104] The American biologist S. K. Humphrey did not underestimate the extent of the slaughter of genius-bearing strains when he wrote: "It is safe to say that among the millions killed will be a million who are carrying _superlatively_ effective inheritances--the dependence of the race's future. Nothing is more absurd than the notion that these inheritances can be replaced in a few generations by encouraging the fecundity of the survivors. They are gone forever. The survivors are going to reproduce their own less-valuable kind. Words fail to convey the appalling nature of the loss."[105]