The difficulty is that the devices which render life more secure frequently make it less interesting and harder to bear. Competition, the struggle for existence and for, what is often more important than mere existence, namely, status, may become so bitter that peace is unendurable.

More than that, under the condition of peace, peoples whose life-habits and traditions have been formed upon a basis of war frequently multiply under conditions of peace to such an extent as to make an ultimate war inevitable. The natives of South Africa, since the tribal wars have ceased, have so increased in numbers as to be an increasing menace to the white population. Any amelioration of the condition of mankind that tends to disturb the racial equilibrium is likely to disturb the peace of nations. When representatives of the Rockefeller Medical Foundation proposed to introduce a rational system of medicine in China, certain of the wise men of that country, it is reported, shook their heads dubiously over the consequences that were likely to follow any large decrease in the death-rate, seeing that China was already overpopulated.

In the same way education, which is now in a way to become a heritage of all mankind, rather than the privilege of so-called superior peoples, undoubtedly has had the effect of greatly increasing the mobility and restlessness of the world's population. In so far as this is true, it has made the problem of maintaining peace more difficult and dangerous.

On the other hand, education and the extension of intelligence undoubtedly increase the possibility of compromise and conciliation which, as Simmel points out, represent ways in which peace may be restored and maintained other than by complete victory and subjugation of the conquered people. It is considerations of this kind that have led men like von Moltke to say that "universal peace is a dream and not even a happy one," and has led other men like Carnegie to build peace palaces in which the nations of the world might settle their differences by compromise and according to law.

d) Competition, status, and social solidarity.—Under the title "Competition, Status, and Social Solidarity" selections are introduced in the materials which emphasize the relation of competition to accommodation. Up to this point in the materials only the relations of conflict to accommodation have been considered. Status has been described as an effect of conflict. But it is clear that economic competition frequently becomes conscious and so passes over into some of the milder forms of conflict. Aside from this it is evident that competition in so far as it determines the vocation of the individual, determines indirectly also his status, since it determines the class of which he is destined to be a member. In the same way competition is indirectly responsible for the organization of society in so far as it determines the character of the accommodations and understandings which are likely to exist between conflict groups. Social types as well as status are indirectly determined by competition, since most of them are vocational. The social types of the modern city, as indicated by the selection on "Personal Competition and the Evolution of Individual Types," are an outcome of the division of labor. Durkheim points out that the division of labor in multiplying the vocations has increased and not diminished the unity of society. The interdependence of differentiated individuals and groups has made possible a social solidarity that otherwise would not exist.

II. MATERIALS

A. FORMS OF ACCOMMODATION

1. Acclimatization[224]

The most important ethnic question in connection with climate is that of the possibility of a race adapting itself to climatic conditions widely different from those to which it has been accustomed. This is the question of acclimatization.

Its bearings on ethnic psychology can be made at once evident by posing a few practical inquiries: Can the English people flourish in India? Will the French colonize successfully the Sudan? Have the Europeans lost or gained in power by their migration to the United States? Can the white or any other race ultimately become the sole residents of the globe?