Note 278 — Chapter V · —Geographical Location

Such broad, intermittent dispersal is the anthropological prototype of the "discontinuous distribution" of biologists. By this they mean that certain types of plants and animals occur in widely separated regions, without the presence of any living representatives in the intermediate area. But they point to the rock records to show that the type once occupied the whole territory, till extensive elimination occurred, owing to changes in climatic or geologic conditions or to sharpened competition in the struggle for existence, with the result that the type survived only in detached localities offering a favorable environment.278 In animal and plant life, the ice invasion of the Glacial Age explains most of these islands of survival; in human life, the invasion of stronger peoples. The Finnish race, which in the ninth century covered nearly a third of European Russia, has been shattered by the blows of Slav expansion into numerous fragments which lie scattered about within the old ethnic boundary from the Arctic Ocean to the Don-Volga watershed.279 The encroachments of the whites upon the red men of America early resulted in their geographical dispersion. The map showing the distribution of population in 1830 reveals large detached areas of Indian occupancy embedded in the prevailing white territory.280 The rapid compression of the tribal lands and the introduction of the reservation system resulted in the present arrangement of yet smaller and more widely scattered groups. Such islands of survival tend constantly to contract and diminish in number with the growing progress, density, and land hunger of the surrounding race. The Kaffir islands and the Hottentot "locations" in South Africa, large as they now are, will repeat the history of the American Indian lands, a history of gradual shrinkage and disappearance as territorial entities.