The preponderant migration of animals from the northern to the southern hemisphere is attributed by Darwin to the greater extent of land in the north, whereby the northern types have existed in greater numbers and have been so perfected through natural selection and competition, that they have surpassed the southern forms in dominating power and therefore have encroached successfully.[310] Also the races and nations of the northern continents have seriously invaded the southern land-masses and are still expanding. It is the largest continent, Eurasia, which has been the chief center of dispersal.
Political domination of large areas.
The Temperate Zone of North America will always harbor a more powerful people than the corresponding zone of South America, because the latter continent begins to contract and tapers off to a point where the other at the northern Tropic begins to spread out. Therefore North America possesses more abundantly all the advantages accruing to a continent from a location in the Temperate Zone. The wide basis of the North Slavs in Russia and Siberia has given them a natural leadership in the whole Slav family, just as the broad unbroken area of ever expanding Prussia gave that state the ascendency in the German Empire over the geographically partitioned and politically dismembered surface of southern Germany. English domination of the United Kingdom is based not only upon race, location, geographical features and resources, but also on the larger size of England. So in the United States, abolitionist statesmen adopted the most effective means of fighting slavery when they limited its area by law, while permitting free states to go on multiplying in the new territory of the vast Northwest.
In a peninsula political ascendency often falls to the broad base connecting it with the continent, because this part alone has the area to support a large population, and moreover commands a large hinterland, whence it continually draws new and invigorating blood. The geographical basis of the Aryan and later the Mongol supremacy in India was the wide zone of lowlands between the Indus and the Brahmaputra. [See map page 103.] The only ancient Greek state ever able to dominate the Balkan Peninsula was non-Hellenic Macedonia, after it had extended its boundaries to the Euxine and the Adriatic. To-day a much larger area in this same peninsular base harbors the widespread southern Slavs, who numerically and economically far outweigh Albanians and Greeks, and who could with ease achieve political domination over the small Turkish minority, were it not for the European fear of a Slavic Bosporus, and its union with Russia. The Cisalpine Gauls of the wide Po basin repeatedly threatened the existence of the smaller but more civilized Etruscan and Latin tribes. The latter, maturing their civilization under the concentrating influences of a limited area, at last dominated the larger Celtic district to the north. But in the nineteenth century this district took the lead in the movement for a United Italy, and now exercises the strong influence in Italian affairs which belongs to it by reason of its superior area, location, and more vigorous race. [See map of Italy's population, Chap. XVI.]
The broad territorial base of the Anglo-Saxon race, Slavs, Germans and Chinese promises a long ethnic life, whereas the narrow foothold, of the Danes, Dutch, Greeks, and the Turks in Europe carries with it the persistent risk of conquest and absorption by a larger neighbor. Such a fate repeatedly threatens these people, but has thus far been warded off, now by the protection of an isolating environment, now by the diplomatic intervention of some not disinterested power. The scattered fragments of Osman stock in European Turkey, which constitute only about ten per cent. of the total population, and are almost lost in the surrounding mass of Slavs and Greeks, provide a poor guarantee for the duration of the race and their empire on European soil. On the other hand, the Osmani who are compactly spread over the whole interior of Asia Minor have a better prospect of national survival.
Area and literature.
An important factor in the preservation of national consciousness and the spread of national influence is always a national language and literature. This principle is recognized by the government of the Czar in its Russification of Finland,[311] Poland, and the German centers in the Baltic provinces, when it substitutes Russian for the local language in education, law courts and all public offices, and restricts the publication of local literature. The survival of a language and its literature is intimately connected with area and the population which that area can support. The extinction of small, weak peoples has its counterpart in the gradual elimination of dialects and languages having restricted territorial sway, whose fate is foreshadowed by the unequal competition of their literatures with those of numerically stronger peoples. An author writing in a language like the Danish, intelligible to only a small public, can expect only small returns for his labor in either influence, fame, or fortune. The return may be so small that it is prohibitive. Hence we find the Danish Hans Christian Andersen and the Norwegian Ibsen writing in German, as do also many Scandinavian scientists. Georg Brandes abandons his native Danish and seeks a larger public by making English the language of his books. The incentive to follow a literary career, especially if it includes making a living, is relatively weak among a people of only two or three millions, but gains enormously among large and cultivated peoples, like the seventy million German-speaking folk of Europe, or the one hundred and thirty millions of English speech scattered over the world. The common literature which represents the response to this incentive forms a bond of union among the various branches of these peoples, and may be eventually productive of political results.