What goals and values were expressed in the various nationalistic movements of the early twentieth century? Which ethnic groups in particular asserted the right of self-determination?

The French revolution and subsequent Napoleonic conquests spread nationalism throughout most of Europe. Inherent in nationalism was the idea that peoples with the same ethnic origins, language, and political ideals had the right to form sovereign states; this concept is termed self-determination. The dynastic and reactionary powers that dominated European affairs during the early nineteenth century either ignored or opposed the principle of self-determination, thereby denying national autonomy to Germans, Italians, and Belgians, among others. Before long, however, a combination of powerful nationalistic movements, revolutions, and wars allowed Belgians to gain independence from the Netherlands in 1830, promoted the unification of Italy in 1861, and secured the unification of Germany in 1871. Yet at the end of the nineteenth century, the issue of nationalism remained unresolved in other areas of Europe, most notably in eastern Europe and the Balkans. There the nationalist aspirations of subject minorities threatened to tear apart the multinational empires of the Ottoman, Habsburg, and Russian dynasties and with them the regional balance of power. In those instances, opposition to foreign rule played a large role in the construction of national identities and demands for self-determination.