The cheapest form of labour is thus being bred on a gigantic scale, and this labour is being accelerated by an industrial development which is stimulated by eviction of the farmers, as the “industrial revolution” was stimulated in England one hundred and thirty years ago. For many years the cotton mills of Bombay have undersold Lancashire in the coarser fabrics, and when, by means of a canal to the Pacific, American cotton can be imported cheaply, they will spin the finer also. Moreover, Hindostan is full of iron and coal which has never been utilized because of the immense difference in the rapidity of European and Asiatic labour, but the steadily falling range of Western prices must force the cheapest product on the market, and when the Indian railways have been assumed by the government, a new era will have opened. The same causes are affecting China and Japan, and, under precisely similar conditions, the centre of exchanges passed from the Tiber to the Bosphorus sixteen hundred years ago. Such uniformity of development in the most distant times, and among the most divergent peoples, points to a progressive law of civilization, each stage of progress being marked by certain intellectual, moral, and physical changes. As the attack in war masters the defence, and the combative instinct becomes unnecessary to the preservation of life, the economic supersedes the martial mind, being superior in bread-winning. As velocity augments and competition intensifies, nature begins to sift the economic minds themselves, culling a favoured aristocracy of the craftiest and the subtlest types; choosing, for example, the Armenian in Byzantium, the Marwari in India, and the Jew in London. Conversely, as the costly nervous system of the soldier becomes an encumbrance, organisms, which can exist on less, successively supplant each other, until the limit of endurance is reached. Thus the Slavs exterminated the Greeks in Thrace and Macedonia, the Mahrattas and the Moslems dwindle before the low caste tribes of India, and the instinct of self-preservation has taught white races to resist an influx of Chinese. When nature has finished this double task, civilization has reached its zenith. Humanity can ascend no higher. In view of this possible extermination of the martial blood in the higher stages of civilization, the attention necessarily becomes concentrated on what is, perhaps, the main point of divergence between ancient and modern society,--the presence and the absence of a supply of barbaric life. All the evidence points to the conclusion that the infusion of vitality which Rome ever drew from territories beyond her borders, was the cause both of her strength and of her longevity. Without such aid she could never have consolidated the world. On the other hand, the lack of this resource has been the weakness of modern nations. One after another they have dreamed of universal conquest, and one after another they have fallen through exhaustion in war.