A race may be thoroughly adjusted to a certain country at one stage of its development and be at a disadvantage when an economic change occurs, such as was experienced in England a century ago when the nation changed from an agricultural to a manufacturing community. The type of man that flourishes in the fields is not the type of man that thrives in the factory, just as the type of man required for the crew of a sailing ship is not the type useful as stokers on a modern steamer. THE HABITAT OF THE ALPINES AND MEDITERRANEANS The environment of the Alpine race seems to have always been the mountainous country of central and eastern Europe, as well as western Asia, but they are now spreading into the plains, notably in Poland and Russia. This type has never flourished in the deserts of Arabia or the Sahara, nor has it succeeded well in maintaining its early colonies in the northwest of Europe within the domain of the Nordic long heads. It is, however, a sturdy and persistent stock and, while much of it may not be overrefined or cultured, undoubtedly possesses great potentialities for future development. The Alpines in the west of Europe, especially in Switzerland and the districts immediately surrounding, have been so thoroughly Nordicized and so saturated with the culture of the adjoining nations that they stand in sharp contrast to backward Alpines of Slavic speech in the Balkans and east of Europe. The Mediterranean race, on the other hand, is clearly a southern type with eastern affinities. It is a type that did not endure in the north of Europe under former agricultural conditions nor is it suitable to the farming districts and frontiers of America and Canada. It is adjusted to subtropical and tropical countries better than any other European type and will flourish in our Southern States and around the coasts of the Spanish Main. In France it is well known that members of the Mediterranean race are better adapted for colonization in Algeria than are French Alpines or Nordics. This subspecies of man is notoriously intolerant of extreme cold, owing to its susceptibility to diseases of the lungs and it shrinks from the blasts of the northern winter in which the Nordics revel. The brunet Mediterranean element in the native American seems to be increasing at the expense of the blond Nordic element generally throughout the Southern States and probably also in the large cities. This type of man, however, is scarce on our frontiers. In the Northwest and in Alaska in the days of the gold rush it was in the mining camps a matter of comment if a man turned up with dark eyes, so universal were blue and gray eyes among the American pioneers. IV THE COMPETITION OF RACES