The utility of such study of military history to the intending warrior is established, not only by a few such eminent authorities, but by a consensus among the leading soldiers and seamen of our own day, whether they personally have, or have not, had the opportunity of command in war. It may be asserted to be a matter of contemporary professional agreement, as much as any other current opinion that now obtains. In such study, native individual capacity and individual temperament will largely affect inference and opinion; not only causing them to differ more or less, but resulting frequently in direct opposition of conclusion. It cannot be otherwise; for, like all other callings of active life, war is a matter, not merely of knowledge and of general principles, but of sound judgment, without which both information and rules, being wrongly applied, become useless. Opinions, even of the most eminent, while accorded the respect due to their reputation, should therefore be brought to the test of personal reflection.
The study of the Art and History of War is pre-eminently necessary to men of the profession, but there are reasons which commend it also, suitably presented, to all citizens of our country. Questions connected with war--when resort to war is justifiable, preparation for war, the conduct of war--are questions of national moment, in which each voter--nay, each talker--has an influence for intelligent and adequate action, by the formation of sound public opinion; and public opinion, in operation, constitutes national policy. Hence it is greatly to be desired that there should be more diffused interest in the critical study of warfare in its broader lines. Knowledge of technical details is not necessary to the apprehension of the greater general principles, nor to an understanding of the application of those principles to particular cases, when made by individual students,--officers or others. The remark is sometimes heard, "When military or naval officers agree, Congress--or the people--may be expected to act." The same idea applied to other professions--waiting for universal agreement--would bring the world to a standstill. Better must be accepted without waiting for best. Better is more worth having to-day than best is the day after the need has come and gone. Hesitation and inaction, continued till the doctors agree, may result in the death of the patient; yet such hesitation is almost inevitable where there is no formed public opinion, and quite inevitable where there is no public interest antecedent to the emergency arising.