Let us now consider some of the implications of this concentration on rendering service. The directed effort of each man to the production of the utility characteristic of his business, tends to result in his learning to conduct that specific activity with a high degree of skill, and with an increasingly valuable fund of experience. So highly specialized does he become that it will be quite impossible for any one hitherto a stranger in that sphere to conduct it as well. Therefore in an age of coördinated effort the more a man has of accumulated knowledge and facility in handling a certain kind of affair and the better fitted, therefore, he is to continue and to progress along that line, the less relatively he is able to undertake the affairs of some other kind with which he is not familiar. We commonly feel free to criticize a railroad, a newspaper, a large business house, perhaps a university, with which we may have casual contact, but the fact is there are few competent critics outside of the ranks of the enterprise itself or of those carrying on activities that are directly similar. In a word, through this focusing of attention, a man will come to be exhaustively familiar with his own occupation, while possessing a merely superficial acquaintance with the theories, customs, and responsibilities of those of others. The wise man therefore argues the necessity of confining himself to the field in which he has become expert and will avoid taking chances in some outside direction wherein he is not familiar. One of the most common and disheartening experiences in the money-making and money-saving of the thrifty is that after having both worked hard and practiced self-restraint, the resultant savings are often put into some enterprise that turns out badly, and the whole effort is thus thrown away. Generally this happens because he has violated the rule we have just stated; he has ventured his savings in unfamiliar fields, ignorantly he has rushed in where the better informed would have feared to tread. Such so-called investments are in reality highly speculative. They involve risks which are unknown and altogether to be avoided. Now no one speculates in his own legitimate business, for there he is acquainted with the hazards which, he has learned, require the best of knowledge and the greatest of prudence. It is the allurement of the unknown that tempts him to seek unearned profits through speculation in outside regions where, in the nature of the case, the chances must be against him. Now speculation has its proper place in business: there are certain inherent hazards that must be undertaken, mainly to be found in the risk of the seasons in the production of crops, and the risk of the future in undeveloped enterprise. These risks must be carried by somebody, but clearly they constitute an activity for specialists who study conditions, becoming relatively expert in determining how and when to act. These specialists