2. Social separation of races (as the "color line" in the South and to a large extent in the North, between Negroes and whites who yet live side by side).

3. Continuous racial antagonism, frequently breaking out into race war. This third possibility has been at least threatened, by the conflict between the white and yellow races in California, and the conflict between whites and Hindus in British Columbia.

None of these alternatives is attractive. The third is undesirable in every way and the first two are difficult to maintain. The first is perhaps impossible; the second is partly practicable, as is shown by the case of the Negro. One of its drawbacks is not sufficiently recognized.

In a soundly-organized society, it is necessary that the road should be open from top to bottom and bottom to top, in order that genuine merit may get its deserts. A valuable strain which appears at the bottom of the social scale must be able to make its way to the top, receiving financial and other rewards commensurate with its value to the state, and being able to produce a number of children proportionate to its reward and its value. This is an ideal which is seldom approximated in government, but it is the advantage of a democratic form of government that it presents the open road to success, more than does an oligarchic government. That this freedom of access to all rewards that the state can give should be open to every one (and conversely that no one should be kept at the top and over-rewarded if he is unworthy) is essential to eugenics; but it is quite incompatible with the existence within the state of a number of isolated groups, some of which must inevitably and properly be considered inferior. It is certain that, at the present time in this country, no Negro can take a place in the upper ranks of society, which are and will long remain white. The fact that this situation is inevitable makes it no less unfortunate for both Negro and white races; consolation can only be found in the thought that it is less of a danger than the opposite condition would be. But this condition of class discrimination is likely to exist, to a much less extent it is true, in every city where there are foreign-born and native-born populations living side by side, and where the epithets of "Sheeny," "Dago," "Wop," "Kike," "Greaser," "Guinea," etc., testify to the feeling of the older population that it is superior.

While eugenic strength in a state is promoted by variety, too great a heterogeneity offers serious social difficulties. It is essential if America is to be strong eugenically that it slow down the flood of immigrants who are not easily assimilable. At present a state of affairs is being created where class distinctions are likely to be barriers to the promotion of individual worth—and equally, of course, to the demotion of individual worthlessness.

Even if an immigration is not assimilated, then, it yet has an indirect effect on eugenics. But there are other indirect effects of immigration, which are quite independent of assimilation: they inhere in the mere bulk and economic character of the immigration. The arrivals of the past few decades have been nearly all unskilled laborers. Professor Carver believes that continuous immigration which enters the ranks of labor in larger proportion and the business and professional classes in a smaller proportion than the native-born will produce the following results:

1. Distribution. It will keep competition more intense among laborers and less intense among business and professional men: it will therefore raise the income of the employing classes and lower the wages of unskilled labor.

2. Production. It will give a relatively low marginal productivity to a typical immigrant and make him a relatively unimportant factor in the production of wealth.

3. Organization of industry. Immigrants can only be employed economically at low wages and in large gangs, because of (2).

4. Agriculture. If large numbers of immigrants should go into agriculture, it will mean one of two things, probably the second: