XIX. By way of conclusion to this subject it may be observed, that all actions no way conducive to obtain a contested right, or to bring the war to a termination, but calculated merely to display the strength of either side are totally repugnant to the duties of a Christian and to the principles of humanity. So that it behoves Christian princes to prohibit all unnecessary effusion of blood, as they must render an account of their sovereign commission to him, by whose authority, and in whose stead, they bear the sword.
[CHAPTER XII.]
On Moderation in Despoiling An Enemy's Country.
Lawfulness of despoiling an enemy's country—Forbearance of using this right, where things may be useful to ourselves, and out of an enemy's power—Forbearance in the hopes of speedy conquest, or where things are not immediately necessary to support an enemy, and aid him in maintaining the war—Buildings for the purposes of religion not to be wantonly destroyed—Advantages of this moderation.
I. One of the three following cases is requisite to justify any one in destroying what BELONGS to another: there must be either such a necessity, as at the original institution of property might be supposed to form an exception, as if for instance any one should throw the sword of another into a river, to prevent a madman from using it to his destruction: still according to the true principles maintained in a former part of this work he will be bound to repair the loss:[67] or there must be some debt, arising from the non-performance of an engagement, where the waste committed is considered as a satisfaction for that debt: or there must have been some aggressions, for which such destruction is only an adequate punishment.
Now, driving off some of our cattle, or burning a few of our houses, can never be pleaded as a sufficient and justifiable motive for laying waste the whole of an enemy's kingdom. Polybius saw this in its proper light, observing, that vengeance in war should not be carried to its extreme, nor extend any further than was necessary to make an aggressor atone justly for his offence. And it is upon these motives, and within these limits alone, that punishment can be inflicted. But except where prompted to it by motives of great utility, it is folly, and worse than folly, wantonly to hurt another.
But upon duly and impartially weighing the matter, such acts are oftener regarded in an odious light, than considered as the dictates of prudent and necessary counsels. For the most urgent and justifiable motives are seldom of long continuance, and are often succeeded by weightier motives of a more humane description.
II. It may be possible, under some circumstances, to detain what belongs to an enemy so as to prevent his deriving advantage from it, in which case it would be an unnecessary and wanton act to destroy it. And to such circumstances the divine law has an eye, in ordering wild trees to be made use of for the construction of works in a siege, while fruit-trees, and every thing necessary for the support of man, ought, if possible, to be spared.
III. Where there is an expectation also of speedy victory and conquest, prudence will dictate to a general or commander of any kind the necessity of forbearing from all acts of destruction, by authorising and committing which he would only be injuring those possessions, that are likely to come into the hands of his own state or sovereign. Thus, as we are informed by Plutarch, when Philip had overrun Thessaly, destroying and plundering the whole country, Flaminius ordered his troops to march in a regular manner, as through a ceded country which had become their own.