(8) It would be easy to make here a pretentious parade of a discouragingly long list of books on war. But _War—What For?_ is primarily for the class of readers who are usually too busy in the present warlike struggle for existence to find time to read a roomful of books on war. However, it is hoped that the present volume may also have readers with opportunity to make extensive studies of the subject. Such readers will find abundant bibliographies already prepared. Excellent book lists for the student of war are as follows: (a) _The Political Science Quarterly_, December, 1900: over 200 titles, at the close of an elaborate article of great worth, “War and Economics in History and in Theory,” by Edward Van Dyke Robinson. (b) A pamphlet, _International Peace, a list of Books with References to Periodicals_: 600 titles with comment on contents, published by the Brooklyn Public Library, 1908. (c) A well selected list of readings in _The Arena_, December, 1894. Following is a list of pamphlets, magazine articles and books, directly or indirectly on the subject of social conflict, of which war is a phase. The list is short, tho’ sufficient, it is hoped, to make a helpful beginning, a short reading course, for any one who would understand the subject of social conflicts, that is, would understand, not the science of war, but the cause, the meaning and results of class struggles and war. There is a vast amount of worthless, or worse than worthless, literature on war: worthless because of the writers’ neglect of the heart of the problem, namely, the _industrial structure_ of all class-labor forms of society, with their _unsocial purpose and method of production_, resulting in the class struggle.