The Yugoslav nationalities question has always been a source of fascination for Western scholars. Inevitably, discussion has centered on the differences between the major Slav nationalities—the Serbs, Croats, Slovenes, Macedonians, and Montenegrins. Less attention has been paid to the problem of the national minorities, although this issue has bedeviled the Yugoslav state since its formation in 1918. Minorities make up approximately a fifth of the Yugoslav population. In times of peace they have been the object of discrimination and exploitation. In times of crisis, the minorities have been the greatest single threat to the internal security of the Yugoslav state.
Over the years since 1918, four nationalities have proven particularly troublesome for the Yugoslavs: the Albanians, Hungarians, Germans, and Italians. The majority of the Albanians live in the autonomous oblast of Kosovo-Metohija (Kosmet) and are Moslem, belonging to the northern, Gheg, Albanian clan.