in the German states into sharp focus. The question became not a matter of if but rather when unification would occur, and when was contingent upon strength. One of the former Frankfurt Parliament members, Johann Gustav Droysen, summed up the problem: We cannot conceal the fact that the whole German question is a simple alternative between Prussia and Austria. In these states, German life has its positive and negative poles—in the former, all the interests [that] are national and reformative, in the latter, all that are dynastic and destructive. The German question is not a constitutional question but a question of power; and the Prussian monarchy is now wholly German, while that of Austria cannot be. Unification under these conditions raised a basic diplomatic problem. The possibility of German (or Italian) unification would overturn the overlapping spheres of influence system created in 1815 at the Congress of Vienna. The principal architects of this convention, Metternich, Castlereagh, and Tsar Alexander (with his foreign secretary Count Karl Nesselrode), had conceived of and organized a Europe balanced and guaranteed by four "great powers": Great Britain, France, Russia, and Austria, with each power having a geographic sphere of influence. France's sphere included the Iberian Peninsula and a share of influence in the Italian states. Russia's included the eastern regions of Central Europe and a balancing influence in the Balkans. Austria's sphere expanded throughout much of the Central European territories formerly held by the Holy Roman Empire. Britain's sphere was the rest of the world, especially the seas. This sphere of influence system depended upon the fragmentation of the German and Italian states, not their consolidation. Consequently, a German nation united under one banner presented significant questions. There was no readily applicable definition for who the German people would be or how far the borders of a German nation would stretch. There was also uncertainty as to who would best lead and defend "Germany", however it was defined. Different groups offered different solutions to this problem. In the Kleindeutschland ("Lesser Germany") solution, the German states would be united under the leadership of the Prussian Hohenzollerns; in the Grossdeutschland ("Greater Germany") solution, the German states would be united under the leadership of the Austrian Habsburgs. This controversy, the latest phase of the German dualism debate that had dominated the politics of the German states and Austro-Prussian diplomacy since the 1701 creation of the Kingdom of Prussia,