Cloth, 8vo, $2.50

"The work as a whole is the most profound and closely reasoned defence of territorial expansion that has yet appeared.... The volume is one of rare thoughtfulness and insight. It is a calm, penetrating study of the trend of civilization and of our part in it, as seen in the light of history and of evolutionary philosophy."—The Chicago Tribune.

"The question which most interests both Professor Giddings and his readers is the application of his facts, his sociology, and his prophecy, to the future of the American Empire.... The reader will rise from it with a broader charity and with a more intelligent hope for the welfare of his country."—The Independent.

The Principles of Sociology

An Analysis of Phenomena of Association and of Social Organization

8vo, Cloth, $3.00

"It is a treatise which will confirm the highest expectations of those who have expected much from this alert observer and virile thinker. Beyond a reasonable doubt, the volume is the ablest and most thoroughly satisfactory treatise on the subject in the English language."—Literary World.

"The distinctive merit of the work is that it is neither economics nor history.... He has found a new field and devoted his energies to its exploration.... The chapters on Social Population and on Social Constitution are among the best in the book. It is here that the method of Professor Giddings shows itself to the best advantage. The problems of anthropology and ethnology are also fully and ably handled. Of the other parts I like best of all the discussion of tradition and of social choices; on these topics he shows the greatest originality. I have not the space to take up these or other doctrines in detail, nor would such work be of much value. A useful book must be read to be understood."—Professor Simon N. Patten, in Science.

The Elements of Sociology

A Text-Book for Colleges and Schools