At the same time we shall not positively deny the possibility of the old system of subsistence reappearing in future wars; it will perhaps be resorted to by belligerents hereafter, where the nature of their mutual relations urge them to it, and circumstances are favourable to its adoption; but we can never perceive in that system a natural organisation; it is much rather an abnormal growth permitted by circumstances, but which can never spring from war in its true sense. Still less can we consider that form or system as any improvement in war on the ground of its being more humane, for war itself is not a humane proceeding.
Whatever method of providing subsistence may be chosen, it is but natural that it should be more easily carried out in rich and well-peopled countries, than in the midst of a poor and scanty population. That the population should be taken into consideration, lies in the double relation which that element bears to the quantity of provisions to be found in a country: first because, where the consumption is large, the provision to meet that consumption is also large; and in the next place, because as a rule a large population produces also largely. From this we must certainly except districts peopled chiefly by manufacturers, particularly when, as is often the case, such districts lie in mountain valleys surrounded by unproductive land; but in the generality of cases it is always very much easier to feed troops in a well populated than in a thinly inhabited country. An army of 100,000 men cannot be supported on four hundred square miles inhabited by 400,000 people, as well as it would be on four hundred square miles with a population of 2,000,000 inhabitants, even supposing the soil equally good in the two cases. Besides, the roads and means of water-carriage are much better in rich countries and afford a greater choice, being more numerous, the means of transport are more abundant, the commercial relations easier and more certain. In a word, there is infinitely less difficulty in supporting an army in Flanders than in Poland.