When we turn our attention eastwards from the lands of {59} Romance and Teutonic to those of Slavonic and Baltic languages, we find that, until recently at all events, there was no accord between the political and the linguistic units, and that, even now, the accord is fragmentary enough. We find also that in place of the principle of 'one region, one language', which applies broadly in the west, there is nearly always a minority language alongside the majority one. The 1914-18 crisis has shown how very unstable were the political units of the last fifty years, and the 'nation-state', that is a settled administration worthy of the name of 'state' combined with a social unit based upon tradition, has only just begun its career in Eastern Europe. Furthermore, in this eastern part of Europe we find languages of non-European character in Finland, Esthonia, Hungary, and Turkey, and to some extent in Bulgaria. This is then the zone of Euro-Asiatic contacts and interpenetrations, and these contacts have determined a great deal of the characteristics of the social order in this part of the Continent. While the above statement is broadly true, it must, nevertheless, be stated that history records considerable and persistent, if partially unsuccessful, efforts to develop the nation-state in those western Slavonic lands which felt the influence of Rome either through the Empire or through the Church, while the contagion of nineteenth-century nationalism has spread far and wide. During the period of close settlement and fixation of language and of growth of administration in the west there were periods of pressure Europewards from Asia, illustrated by the coming of Szeklers and Magyars, and the formation of the Magyar kingdom of Hungary, by the advance of the Bulgars, since practically Slavonized, by the pressure of the Mongols on Russia, and by the spread of the Turks. The spread of Finn or Finno-Ugrian peoples westward along the north is probably older, and has been more gradual and less organized.