Strong, healthy, and flourishing nations increase in numbers. From a given moment they require a continual expansion of their frontiers, they require new territory for the accommodation of their surplus population. Since almost every part of the globe is inhabited, new territory must, as a rule, be obtained at the cost of its possessors--that is to say, by conquest, which thus becomes a law of necessity. The right of conquest is universally acknowledged. At first the procedure is pacific. Over-populated countries pour a stream of emigrants into other States and territories. These submit to the legislature of the new country, but try to obtain favourable conditions of existence for themselves at the cost of the original inhabitants, with whom they compete. This amounts to conquest. The right of colonization is also recognized. Vast territories inhabited by uncivilized masses are occupied by more highly civilized States, and made subject to their rule. Higher civilization and the correspondingly greater power are the foundations of the right to annexation. This right is, it is true, a very indefinite one, and it is impossible to determine what degree of civilization justifies annexation and subjugation. The impossibility of finding a legitimate limit to these international relations has been the cause of many wars. The subjugated nation does not recognize this right of subjugation, and the more powerful civilized nation refuses to admit the claim of the subjugated to independence. This situation becomes peculiarly critical when the conditions of civilization have changed in the course of time. The subject nation has, perhaps, adopted higher methods and conceptions of life, and the difference in civilization has consequently lessened. Such a state of things is growing ripe in British India. Lastly, in all times the right of conquest by war has been admitted. It may be that a growing people cannot win colonies from uncivilized races, and yet the State wishes to retain the surplus population which the mother-country can no longer feed. Then the only course left is to acquire the necessary territory by war. Thus the instinct of self-preservation leads inevitably to war, and the conquest of foreign soil. It is not the possessor, but the victor, who then has the right. The threatened people will see the point of Goethe's lines: "That which them didst inherit from thy sires, In order to possess it, must be won." The procedure of Italy in Tripoli furnishes an example of such conditions, while Germany in the Morocco question could not rouse herself to a similar resolution.[C]