The outbreak of war in Europe is an event too momentous to be treated fully in this Preface. But I may point out that the catastrophe resulted from the two causes of unrest described in this volume, namely, the Alsace-Lorraine Question and the Eastern Question. Those disputes have dragged on without any attempt at settlement by the Great Powers. The Zabern incident inflamed public opinion in Alsace-Lorraine, and illustrated the overbearing demeanour of the German military caste; while the insidious attempts of Austria in 1913 to incite Bulgaria against Servia marked out the Hapsburg Empire as the chief enemy of the Slav peoples of the Balkan Peninsula after the collapse of Turkish power in 1912. The internal troubles of the United Kingdom, France, and Russia in July 1914 furnished the opportunity so long sought by the forward party at Berlin and Vienna; and the Austro-German Alliance, which, in its origin, was defensive (as I have shown in this volume), became offensive, Italy parting from her allies when she discovered their designs. Drawn into the Triple Alliance solely by pique against France after the Tunis affair, she now inclines towards the Anglo-French connection. Readers of my chapter on the Eastern Question will not fail to see how the neglect of the Balkan peoples by the Great Powers has left that wound festering in the weak side of Europe; and they will surmise that the Balkan troubles have, by a natural Nemesis, played their part in bringing about the European War. It is for students of modern Europe to seek to form a healthy public opinion so that the errors of the past may not be repeated, and that the new Europe shall be constituted in conformity with the aspirations of the peoples themselves. CAMBRIDGE, _September_ 25, 1914. PREFACE The line of Virgil quoted on the title-page represents in the present case a sigh of aspiration, not a paean of achievement. No historical student, surely, can ever feel the conviction that he has fathomed the depths of that well where Truth is said to lie hid. What, then, must be the feelings of one who ventures into the mazy domain of recent annals, and essays to pick his way through thickets all but untrodden? More than once I have been tempted to give up the quest and turn aside to paths where pioneers have cleared the way. There, at least, the whereabouts of that fabulous well is known and the plummet is ready to hand. Nevertheless, I resolved to struggle through with my task, in the consciousness that the work of a pioneer may be helpful, provided that he carefully notches the track and thereby enables those who come after him to know what to seek and what to avoid.