quality:correction, structural:summarization
Breakup

After Tito's death on 4 May 1980, ethnic tensions grew in Yugoslavia. The legacy of the Constitution of 1974 threw the system of decision-making into a state of paralysis, made all the more hopeless as the conflict of interests became irreconcilable. The Albanian majority in Kosovo demanded the status of a republic in the 1981 protests in Kosovo while Serbian authorities suppressed this sentiment and proceeded to reduce the province's autonomy.

In 1986, the Serbian Academy of Sciences and Arts drafted a memorandum addressing some burning issues concerning the position of Serbs as the most numerous people in Yugoslavia. The largest Yugoslav republic in territory and population, Serbia's influence over the regions of Kosovo and Vojvodina was reduced by the 1974 Constitution. Because its two autonomous provinces had de facto prerogatives of full-fledged republics, Serbia found that its hands were tied, for the republican government was restricted in making and carrying out decisions that would apply to the provinces. Since the provinces had a vote in the Federal Presidency Council (an eight-member council composed of representatives from the six republics and the two autonomous provinces), they sometimes even entered into coalitions with other republics, thus outvoting Serbia. Serbia's political impotence made it possible for others to exert pressure on the 2 million Serbs (20% of the total Serbian population) living outside Serbia.

After Tito's death, Serbian communist leader Slobodan Milošević began making his way toward the pinnacle of Serbian leadership. Milošević sought to restore pre-1974 Serbian sovereignty. Other republics, especially Slovenia and Croatia, denounced his proposal as a revival of greater Serbian hegemonism. Through a series of moves known as the " anti-bureaucratic revolution ", Milošević succeeded in reducing the autonomy of Vojvodina and of Kosovo and Metohija, but both entities retained a vote in the Yugoslav Presidency Council. The very instrument that reduced Serbian influence before was now used to increase it: in the eight-member Council, Serbia could now count on four votes at a minimum: Serbia proper, then-loyal Montenegro, Vojvodina, and Kosovo.

As a result of these events, ethnic Albanian miners in Kosovo organised the 1989 Kosovo miners' strike, which dovetailed into an ethnic conflict between the Albanians and the non-Albanians in the province. At around 80% of the population of Kosovo in the 1980s, ethnic-Albanians were the majority. With Milošević gaining control over Kosovo in 1989, the original residency changed drastically leaving only a minimum number of Serbians in the region. The number of Serbs in Kosovo was quickly declining for several reasons, among them the ever-increasing ethnic tensions and subsequent emigration from the area.

Meanwhile, Slovenia, under the presidency of Milan Kučan, and Croatia supported the Albanian miners and their struggle for formal recognition. Initial strikes turned into widespread demonstrations demanding a Kosovar republic. This angered Serbia's leadership which proceeded to use police force and later, federal police troops to restore civil order.

In January 1990, the extraordinary 14th Congress of the League of Communists of Yugoslavia was convened, where the Serbian and Slovenian delegations argued over the future of the League of Communists and Yugoslavia. The Serbian delegation, led by Milošević, insisted on a policy of "one person, one vote" which would empower the plurality population, the Serbs. In turn, the Slovenian delegation, supported by Croats, sought to reform Yugoslavia by devolving even more power to republics, but were voted down. As a result, the Slovene and Croatian delegations left the Congress and the all-Yugoslav Communist party was dissolved.

The constitutional crisis that inevitably followed resulted in a rise of nationalism in all republics: Slovenia and Croatia voiced demands for looser ties within the federation. Following the fall of communism in Eastern Europe, each of the republics held multi-party elections in 1990. Slovenia and Croatia held the elections in April since their communist parties chose to cede power peacefully. Other Yugoslav republics—especially Serbia—were more or less dissatisfied with the democratisation in two of the republics and proposed different sanctions (e.g. Serbian "customs tax" for Slovene products) against the two, but as the year progressed, other republics' communist parties saw the inevitability of the democratisation process. In December, as the last member of the federation, Serbia held parliamentary elections confirming the rule of former communists in the republic.

Slovenia and Croatia elected governments oriented towards greater autonomy of the republics (under Milan Kučan and Franjo Tuđman, respectively). Serbia and Montenegro elected candidates who favoured Yugoslav unity. The Croat quest for independence led to large Serb communities within Croatia rebelling and trying to secede from the Croat republic. Serbs in Croatia would not accept the status of a national minority in a sovereign Croatia since they would be demoted from the status of a constituent nation.