The large area which misleads a primitive folk into excessive dispersion and the dissipation of their tribal powers, offers to an advanced people, who in some circumscribed habitat have learned the value of land, the freest conditions for their development. A wide, unobstructed territory, occupied by a sparse population of wandering tribes capable of little resistance to conquest or encroachment, affords the most favorable conditions to an intruding superior race. Such conditions the Chinese found in Mongolia and Manchuria, the Russians in Siberia, and European colonists in the Americas, Australia and Africa. Almost unlimited space and undeveloped resources met their land hunger and their commercial ambition. Their numerical growth was rapid, both by the natural increase reflecting an abundant food supply, and by accessions from the home countries. Expansion advanced by strides. In contrast to this care-free, easy development in a new land, growth in old countries like Europe and the more civilized parts of Asia means a slow protrusion of the frontier, made at the cost of blood; it means either the absorption of the native people, because there are no unoccupied corners into which they can be driven, or the imposition upon them of an unwelcome rule exercised by alien officials. Witness the advance of the Russians into Poland and Finland, of the Germans into Poland and Alsace-Lorraine, of the Japanese into Korea, and of the English into crowded India. The rapid unfolding of the geographical horizon in a young land communicates to an expanding people new springs of mobility, new motives for movement out and beyond the old confines, new goals holding out new and undreamt of benefits. Life becomes fresh, young, hopeful. Old checks to natural increase of population are removed. Emigrant bands beat out new trails radiating from the old home. They go on individual initiative or state-directed enterprises; but no matter which, the manifold life in the far-away periphery reacts upon the center to vivify and rejuvenate it. [Sidenote: Relation of ethnic to political expansion.]