In the higher stages of civilization, the use of goods is wont to be divided more and more into special branches, according to the different peculiarities of the goods themselves, and of the different wants of men; a course of things which is, both as cause and effect, intimately related to the division of labor. I here speak of a principle of _division of use_ (differentiation and specialization). Thus, for instance, Lorenz Lange, in 1722, found only one kind of tea in the trade between Russia and China; Müller, in 1750, found seven; Pallas, in 1772, ten; and Erman, in 1829, about seven hundred.[207-4] As the number of gradations of different kinds of the same goods increases with civilization, there is, in times of war, a retrogression in this respect, to a lower economic stage.[207-5] Opposed to this, we have the principle of the combination of use. There are numberless kinds of goods which may serve a great many just as well as they can one exclusive user; and this either successively or simultaneously, inasmuch as there is no necessity why, with the increasing use of the object, the size of the object itself should increase in an equal proportion. (According to Marlo: wealth usable by one; wealth usable by many; wealth usable by all.) Thus, for instance, a public library may be incomparably more complete, and accessible in a still higher degree than ten private libraries which together cost as much as it did. And so, a restaurant-keeper may serve a hundred guests at the same time, with a much greater table-variety, more to their taste, and at a more convenient time, than if each person made the same outlay for his private kitchen.[207-6] While formerly, only the great could travel rapidly, combination of use has enabled even the lower classes to do so in our own days. There is, doubtless, a dark side to this picture, too. Combination of use requires frequently great sacrifices of personal independence, which should not be underestimated when they affect individuality of character, or threaten the intimacy and closeness of family life. It is, however, a bad symptom when the division of use increases without any corresponding combination of use.[207-7] [207-8] [Footnote 207-1: We should also mention here destructive consumption, where the defenders of a country destroy buildings, supplies, etc., only that the enemy may not use them.] [Footnote 207-2: Compare Die Lebensaufgabe der Hausfrau, Leipzig, 1853; _von Stein_, Die Frau auf dem Gebiete der National Oekonomie, 1875, and the beautiful remarks of _Schäffle_, N. Oek., 166; and _Lotz_, Mikrokosmus, II, 370 ff.]