Improvements in guns, armor, fortification and shipbuilding have been pushed so near to perfection that naval and semi-naval engagements may justly be counted amongst the arts of peace, and must eventually obtain the medical recognition which is their due as means of sanitation. The most notable improvements are those in small arms. Our young scapegrace grandfathers fought the Revolutionary War with so miserable firearms that they could not make themselves decently objectionable to the minions of monarchy at a greater distance than forty yards. They had to go up so close that many of them lost their tempers. With the modern rifle, incivilities can be carried on at a distance of a mile-and-a-half, with thin lines and a cheerful disposition. The dynamite shell has, unfortunately, done much to gloom this sunniness by suggesting a scattered formation, which makes conversation difficult and begets loneliness. Isolation leads to suicide, and suicide is “mortality.” So the dynamite shell is really not the life-saving device that it looks. But on the whole we seem to be making reasonably good progress toward that happy time, not when “war shall be no more,” but when, being healthful, it will be universal and perpetual. The soldier of the future will die of age; and may God have mercy on his cowardly soul! It has been said that to kill a man in battle a man’s weight in lead is required. But if the battle happens to be fought by modern warships or forts, or both, about a hundred tons of iron would seem to be a reasonable allowance for the making of a military corpse. In fighting in the open the figures are more cheering. What it cost in our civil war to kill a Confederate soldier is not accurately computable; we don’t know exactly how many we had the good luck to kill. But the “best estimates” are easily accessible. II In the _Century_ magazine several years ago was a paper on machine guns and dynamite guns. As might have been expected, it opened with a prediction by a distinguished general of the Union armies that, so murderous have warlike weapons become, “the next war will be marked by terrific and fearful slaughter.” This is naturally followed by the writer’s smug and comfortable assurance that “in the extreme mortality of modern war will be found the only hope that man can have of even a partial cessation of war.” If this were so, let us see how it would work. The chronological sequence of events would necessarily (obviously, one would think) be something like this: 1. Murderous perfection of warlike weapons. 2. War marked by “terrific and fearful slaughter.” 3. Consequent cessation of war and disarmament of nations. 4. Stoppage of the manufacture of military weapons, with resulting decay of dependent industries; that is to say, decay of the ability to produce the weapons. Diversion of intellectual activity to arts of peace.