In the second place, each volume will consist, not of brief articles, summary in character, dealing with a great variety of topics many of them of secondary importance, and intended to convey philosophical information, but of original and relatively exhaustive discussions of fundamental aspects of each main subject. The Articles, as in the present volume, will be few in number. But they will be written by some of the most eminent philosophical thinkers in Europe and America and, above all, they will be the exposition of the determining principles of their thought upon the great departments of philosophical specula tion, and at the same time indicate their attitude towards the living experience of their times.