That a new history of the United States is needed, extending from the discovery down to the present time, hardly needs statement. No such comprehensive work by a competent writer is now in existence. Individual writers have treated only limited chronological fields. Meantime there, is a rapid increase of published sources and of serviceable monographs based on material hitherto unused. On the one side there is a necessity for an intelligent summarizing of the present knowledge of American history by trained specialists; on the other hand there is need of a complete work, written in untechnical style, which shall serve for the instruction and the entertainment of the general reader. To accomplish this double task within a time short enough to serve its purpose, there is but one possible method, the co-operative. Such a division of labor has been employed in several German, French, and English enterprises; but this is the first attempt, to carry out that system on a large scale for the whole of the United States. The title of the work succinctly suggests the character of the series, The American Nation. A History. From Original Materials by Associated Scholars. The subject is the "American Nation," the people combined into a mighty political organization, with a national tradition, a national purpose, and a national character. But the nation, as it is, is built upon its own past and can be understood only in the light of its origin and development. Hence this series is a "history," and a consecutive history, in which events shall be shown not only in their succession, but in their relation to one another; in which cause shall be connected with effect and the effect become a second cause. It is a history "from original materials," because such materials, combined with the recollections of living men, are the only source of our knowledge of the past. No accurate history can be written which does not spring from the sources, and it is safer to use them at first hand than to accept them as quoted or expounded by other people. It is a history written by "scholars"; the editor expects that each writer shall have had previous experience in investigation and in statement. It is a history by "associated scholars," because each can thus bring to bear his special knowledge and his special aptitude. Previous efforts to fuse together into one work short chapters by many hands have not been altogether happy; the results have usually been encyclopaedic, uneven, and abounding in gaps. Hence in this series the whole work is divided into twenty-six volumes, in each of which the writer is free to develop a period for himself. It is the editor's function to see that the links of the chain are adjusted to each other, end to end, and that no considerable subjects are omitted