But this principle of unity is not the true one, for two reasons: first, that the motive leading the House of Hapsburg to the difficult task of so complicated a government is not a religious motive; and, secondly, because this religious unity is subject to profound modification. Hungary, though Catholic in its majority, contains, and is largely governed by, powerful Protestant families, who are supported by considerable bodies of Protestant population. The Greek Church is the religious profession of great numbers along the Lower Danube valley and to the south of the river Save. There are in Bosnia a considerable number of Mahomedans even, and I have already mentioned the numerous Jewish population of the north-east, particularly in Galicia. The true principle of unity in what has hitherto been the Austro-Hungarian Empire is twofold. It consists, first, in the reigning family, considerable personal attachment to which is felt in every section of its dominions, utterly different as these are one from another; and, secondly (a more important point), in the historical development of the State. It is this last matter which explains all, and which can make us understand why a realm so astonishingly ill constructed was brought into the present struggle as one force, and that force a force allied to, and in a military sense identical with, modern Prussian Germany. For the historical root of Austria-Hungary is German. Of its population (some fifty-one millions) you may say that only about a quarter are German-speaking (less than another quarter are Magyar-speaking, most of the rest Slavonic in speech, together with some proportion of Roumanian and Italian). But it is from this German _quarter_ and from the emperor at their head that the historical growth of the State depends, because this German _quarter_ was the original Christian nucleus and the civilized centre, which had for its mission the reduction of Slavonic and Magyar barbarism. The Slavs of the Bohemian quadrilateral were subjected, not indeed by conquest, but by a process of culture, to Vienna. The crown of Hungary, when it fell by marriage to the Hapsburgs, continued that tradition; and when the Empress Maria-Theresa, in the last century, participated in the abominable crime of Frederick the Great of Prussia, and took her share of the dismembered body of Poland (now called the Austrian province of Galicia), that enormous blunder was, in its turn, a German blunder undertaken under the example of Northern Germany, and as part of a movement German in spirit and origin. The same is true even of the very latest of the Austrian developments, the annexation of Bosnia and Herzegovina. The act was that of Vienna, but the spirit behind it, perhaps the suggestion of it, and the support that made it possible came from Berlin.