It is the object of this book, and those which will succeed it in the same series, to put before the reader the main lines of the European War as it proceeds. Each such part must necessarily be completed and issued some little time after the events to which it relates have passed into history. The present first, or introductory volume, which is a preface to the whole, covers no more than the outbreak of hostilities, and is chiefly concerned with an examination of the historical causes which prod

War is the attempt of two human groups each to impose its will upon the other by force of arms. This definition holds of the most righteous war fought in self-defence as much as it does of the most iniquitous war of mere aggression. The aggressor, for instance, proposes to take the goods of his victim without the pretence of a claim. He is attempting to impose his will upon that victim. The victim, in resisting by force of arms, is no less attempting to impose his will upon the aggressor; and if

Here, then, at the beginning of August 1914, are the five great Powers about to engage in war. Russia, France, and Great Britain, whom we will call the Allies, are upon one side; the German Empire and Austria-Hungary, whom we will call the Germanic Powers, are upon the other. We must at the outset, if we are to understand the war at all, see how these two combatant groups stood in strength one against the other when the war broke out. And to appreciate this contrast we must know two things—their

In any general view of the great war which aims both at preserving proportion between its parts, and at presenting especially the main lines in relief, the three weeks between the German sudden forcing of war and the seventeen or eighteen days between the English declaration and the main operations upon the Sambre, will have but a subsidiary importance. They were occupied for at least half the period in the mobilization of the great armies. They were occupied for the second half of the period in