Created after World War I, 'Yugoslavia' was a combination of ethnically, religiously, and linguistically diverse but connected South Slav peoples - Slovenes, Croats and Serbs but also Bosnian Muslims, Macedonians, and Montenegrins - in addition to non-Slav minorities. The Great Powers and the country's intellectual and political elites believed that a coherent identity could be formed in which the different South Slav groups in the state could identify with a single Balkan Yugoslav identity. Pieter Troch draws on previously unpublished sources from the domain of education to show how the...