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588 it in a thoroughly rational way. It means that the object of our sentiment corresponds in some special way to some inherited or acquired disposition. Such a disposition is the affection of a mother for her child, which is instinctive. Or even the feeling she may have for the child's empty cradle, which is acquired. The existence of a sentimental attitude indicates that there are motives for action of which the individual who is moved by them is not wholly conscious; motives over which he has only a partial control. Every sentiment has a history, either in the experience of the individual, or in the experience of the race, but the person who acts on that sentiment may not be aware of the history. Interests are directed less toward specific objects than toward the ends which this or that particular object at one time or another embodies. Interests imply, therefore, the existence of means and a consciousness of the distinction between means and ends. Money is the cardinal device by which values have become rationalized and sentiments have been replaced by interests. It is just because we feel no personal and no sentimental attitude toward our money, such as we do toward, for example, our home, that money becomes a valuable means of exchange. We will be interested in acquiring a certain amount of money in order to achieve a certain purpose, but provided that purpose may be achieved in any other way we are likely to be just as well satisfied. It is only the miser who becomes sentimental about money, and in that case he is likely to prefer one sort of money, say gold, to another irrespective of its value. In this case the value of gold is determined by personal sentiment rather than by reason.

An organization which is composed of competing individuals and of competing groups of individuals is in a state of unstable equilibrium, and this equilibrium can be maintained only by a process of continuous readjustment. This aspect of social life and this type of social organization are best represented in the world of business which is the special object of investigation of political economy.

The extension of industrial organization, which is based on the impersonal relations defined by money, has gone forward hand in hand with an increasing mobility of the population. The laboring man and the artisan, fitted to perform a specific task, are compelled under the conditions created by city life to move from one region to another in search of the particular kind of employment which they are fitted to perform. The tide of immigration which moves back and forth between Europe and America is to some extent a measure of this same mobility.