Of course, there have been wars which were not due to deliberate attacks by poor and strong countries on rich and weak countries; wars like our wars of the Revolution, and with Mexico, our War of the Rebellion, and our Spanish War, and many others in which various nations have engaged. The causes of many wars have been so numerous and so complex that the true cause is hard to state; but it may be stated in general that wars in which countries that were both rich and strong, as Great Britain and France are now, have deliberately initiated an aggressive war are few and far apart. The reason seems to be that countries which are rich tend to become not militaristic and aggressive, but effeminate and pacific. The access of luxury, the refinements of living that the useful and the delightful arts produce, and the influence of women, tend to wean men from the hardships of military life, and to engender a distaste for the confusion, bloodshed, and "horrors" of war. For this reason, the rich countries have shown little tendency to aggression, but a very considerable tendency to invite aggression. Physical fighting among nations bears some resemblance to physical fighting among men, in that rich nations and rich men are apt to abstain from it, unless they are attacked; or unless they think they are attacked, or will be. The fact of being rich has the double influence of removing a great inducement to go to war, and of causing a distaste for it. For all of the reasons given above, it would seem advisable when making an "estimate of the situation," in preparation for war, to estimate it as gravely as reasonable probability will permit. The tendency of human nature is to estimate it too lightly; but in matters of possible war, "madness lies that way." This seems to mean that in preparing plans for additions to the fleet for war, we should estimate for the worst condition that is reasonably probable. In the United States, this means that we should estimate for a sudden attack by a powerful fleet on our Atlantic coast; and, as such an attack would occasion a tremendous temptation to any foe in Asia to make a simultaneous attack in the Pacific, we must estimate also for sending a large fleet at the same time on a cruise across the Pacific Ocean. This clearly means that our estimate must include putting into the Atlantic and Pacific all the naval vessels that we have, fully manned with fully drilled crews; and adding besides all the vessels from civil life that will be needed. The vessels taken from civil life will be mostly from the merchant service, and will be for such auxiliary duties as those of hospital ships, supply ships, fuel ships, and ammunition ships, with some to do duty as scouts.