The concept assimilation, so far as it has been defined in popular usage, gets its meaning from its relation to the problem of immigration. The more concrete and familiar terms are the abstract noun Americanization and the verbs Americanize, Anglicize, Germanize, and the like. All of these words are intended to describe the process by which the culture of a community or a country is transmitted to an adopted citizen. Negatively, assimilation is a process of denationalization, and this is, in fact, the form it has taken in Europe.

The difference between Europe and America, in relation to the problem of cultures, is that in Europe difficulties have arisen from the forcible incorporation of minor cultural groups, i.e., nationalities, within the limits of a larger political unit, i.e., an empire. In America the problem has arisen from the voluntary migration to this country of peoples who have abandoned the political allegiances of the old country and are gradually acquiring the culture of the new. In both cases the problem has its source in an effort to establish and maintain a political order in a community that has no common culture. Fundamentally the problem of maintaining a democratic form of government in a southern village composed of whites and blacks, and the problem of maintaining an international order based on anything but force are the same. The ultimate basis of the existing moral and political order is still kinship and culture. Where neither exist, a political order, not based on caste or class, is at least problematic.

Assimilation, as popularly conceived in the United States, was expressed symbolically some years ago in Zangwill's dramatic parable of The Melting Pot. William Jennings Bryan has given oratorical expression to the faith in the beneficent outcome of the process: "Great has been the Greek, the Latin, the Slav, the Celt, the Teuton, and the Saxon; but greater than any of these is the American, who combines the virtues of them all."

Assimilation, as thus conceived, is a natural and unassisted process, and practice, if not policy, has been in accord with this laissez faire conception, which the outcome has apparently justified. In the United States, at any rate, the tempo of assimilation has been more rapid than elsewhere.

Closely akin to this "magic crucible" notion of assimilation is the theory of "like-mindedness." This idea was partly a product of Professor Giddings' theory of sociology, partly an outcome of the popular notion that similarities and homogeneity are identical with unity. The ideal of assimilation was conceived to be that of feeling, thinking, and acting alike. Assimilation and socialization have both been described in these terms by contemporary sociologists.

Another and a different notion of assimilation or Americanization is based on the conviction that the immigrant has contributed in the past and may be expected in the future to contribute something of his own in temperament, culture, and philosophy of life to the future American civilization. This conception had its origin among the immigrants themselves, and has been formulated and interpreted by persons who are, like residents in social settlements, in close contact with them. This recognition of the diversity in the elements entering into the cultural process is not, of course, inconsistent with the expectation of an ultimate homogeneity of the product. It has called attention, at any rate, to the fact that the process of assimilation is concerned with differences quite as much as with likenesses.

2. The Sociology of Assimilation

Accommodation has been described as a process of adjustment, that is, an organization of social relations and attitudes to prevent or to reduce conflict, to control competition, and to maintain a basis of security in the social order for persons and groups of divergent interests and types to carry on together their varied life-activities. Accommodation in the sense of the composition of conflict is invariably the goal of the political process.

Assimilation is a process of interpenetration and fusion in which persons and groups acquire the memories, sentiments, and attitudes of other persons or groups, and, by sharing their experience and history, are incorporated with them in a common cultural life. In so far as assimilation denotes this sharing of tradition, this intimate participation in common experiences, assimilation is central in the historical and cultural processes.

This distinction between accommodation and assimilation, with reference to their rôle in society, explains certain significant formal differences between the two processes. An accommodation of a conflict, or an accommodation to a new situation, may take place with rapidity. The more intimate and subtle changes involved in assimilation are more gradual. The changes that occur in accommodation are frequently not only sudden but revolutionary, as in the mutation of attitudes in conversion. The modifications of attitudes in the process of assimilation are not only gradual, but moderate, even if they appear considerable in their accumulation over a long period of time. If mutation is the symbol for accommodation, growth is the metaphor for assimilation. In accommodation the person or the group is generally, though not always, highly conscious of the occasion, as in the peace treaty that ends the war, in the arbitration of an industrial controversy, in the adjustment of the person to the formal requirements of life in a new social world. In assimilation the process is typically unconscious; the person is incorporated into the common life of the group before he is aware and with little conception of the course of events which brought this incorporation about.