Such grouping of ideas as has thus far been considered, although of the greatest importance, is only the beginning of the organization of knowledge. For thus far only the minimum unit of advance has been under discussion. Asone proceeds in the study of a subject these smaller units collect in large numbers, and they must themselves be subordinated to still broader central thoughts, according to their nature. This grouping of details, according to their relationships, into points, and of such points under still higher heads, and so on until a whole subject and even the whole field of knowledge is carefully ordered according to the relationships of its parts, is what is meant by organization of knowledge.

Sometimes an entire book is thus organized under a single idea, Fiske's Critical Period of American History being an excellent example. In this volume the conditions at the close of the Revolutionary War are vividly described. It is shown that great debts remained unpaid, that different systems of money caused confusion, and that civil war was seriously threatened in various quarters. These and other dangers convinced sober men that a firm central government was indispensable. But then, it was no easy matter to bring such a government into existence; and it is shown how numerous heroic attempts in this direction barely escaped failure before the constitution was finally adopted. On the whole, it is safe to say that each paragraph or small number of paragraphs, while constituting a unit, is at the same time a necessary part of the chapter to which it belongs; likewise, each chapter, while constituting a unit, is an integral part of the book as a whole; and all these parts are so interrelated and complete that the whole book constitutes a unit.

Observe the advantage of such organization. The period of our history immediately following the Revolution used to be one of the least interesting of topics. Under the title "The Period following the Treaty of Paris," or "The Period from the Close of the Revolutionary War to the Adoption of the Constitution," the textbooks attempted nothing more than an enumeration or history of the chief difficulties and struggles of our youthful nation. In some cases, if I remember correctly, this was designated "The Period of Confusion," and its description left the reader in a thoroughly confused state of mind.

Fiske's book was a revelation. What had seemed very complex and confused became here extremely simple; what had been especially dull became here perhaps the most exciting topic in all our history. And the secret of the advance is found to a large extent in the organization. Thus organization is a means of effectiveness in the presentation of knowledge, as in the use of a library or the conduct of a business.

The basis for the organization of knowledge in general.

All the facts in Mr. Fiske's book are organized about the stirring question expressed in his title, i. e., how our ship of state barely escaped being wrecked. Because this idea is of intense interest to us, and the entire book bears upon it continually, the story is read with bated breath. Drummond's Greatest Thing in the World is another excellent example on a smaller scale of ideas centered about a vital human question. Thus specific problems of various degrees of breadth, that are intimately related to man, can well be taken as the basis for the organization of knowledge in general. Classical literature is organized on this basis, which is called the pedagogical or psychological basis, and it seems desirable that other fields should also be.

Yet there are other kinds of organization in which the relation to man is not so plainly, or not at all, taken as the controlling idea. For example, biology is often organized on the basis of the growing complexity of the organism, the student beginning with the simple, microscopic cell, and advancing to the more and more complex forms. Formerly, after the Linnaean system, plants were classified according to their similarity of structure. Now both plants and animals are often classified on the basis of their manner of adaptation to their environment. Thus within the field of science there is what is called the scientific basis of organization.

There is also the logical basis of organization of thought, according to which some most fundamental idea is taken as the beginning of a system, or the premise, and other ideas are evolved from this first principle. Rousseau attempted to develop his educational doctrine in this way, starting with the assertion that everything was good as it came from the Creator, but that everything degenerated in the hands of man. John Calvin did the same in his system of theology; and he reasoned so succinctly from his few premises that any one granting these was almost compelled to accept his entire doctrine.

Attention is called to these facts here in order to suggest that, while the scientific and the logical bases of organization are in common use, neither of them is adequate as the main basis of organization for a young student who is studying a subject for the first time. The reason is that each of them secures a careful ordering of facts only with reference to the relations that those facts bear to one another, and not with reference to the relation that they bear to man; and in thus ignoring man they show grave faults. They are indifferent to interest on the part of the learner; they offer no standard for judging the relative worths of facts to man; and instead of exerting an influence in the direction of applying knowledge, they exert some influence in the opposite direction by their indifference to man's view-point. It must be admitted that they are of great assistance in securing thoroughness of comprehension by their revelation of the relations existing among facts, and also that they classify facts in a convenient way for finding them later; but they are of greatest use to the advanced student, who is already supplied with motive and with standards for judging worth, and who has proper habits of study already formed; they can well follow but they should not supplant the psychological basis.

The student's double task in the organization of ideas.