Today's countries Croatia, Slovenia, Bosnia and Herzegovina, Serbia were not independent and sovereign states for century, but were a part of the Habsburg or Ottoman Empire. In these countries, there has always been a desire for autonomy, but it has been difficult to achieve it because of the lack of political leadership. The emergence of the Illyrian Movement led to the tendency and consciousness of independence through the unification of the south Slavs into one state. Independence takes place with the Corfu declaration and the creation of the Kingdom of Serbs, Croats and Slovenes. The first adapted constitution is the Vidovdan constitution from which it follows that Yugoslavia is a parliamentary monarchy. The Second World War brings a milestone and Yugoslavia is formed and called the Socialist Federal Republic of Yugoslavia, which included the present-day states of Slovenia, Croatia, Serbia, Bosnia and Herzegovina, Macedonia, Montenegro and Kosovo. For the duration of the SFRY from 1943 to 1992, there were two autonomous provinces of Kosovo and Vojvodina. The political program conducted in the SFRY was the communist program with features of socialist governance. Yugoslavia was founded on a federal principle that should allow equality for all peoples within the state. The 1974 Constitution introduces changes in the creation of conditions for the building of socialist social relations based on the dominance of the working class and changes in the position and functions of the federation, socialist republics and autonomous provinces in order to achieve a balance between nations. A few years before the constitution was adopted in Croatia, a national movement awakens Croatian Spring is led by political representatives Miko Tripalo and Savka Dabčević-Kučar and supported by Matrix Croatian and university students. The new constitution defines the provisions of Yugoslavia as a federal state and the socio-political community, defines the republics and autonomous provinces. The Republic and the Autonomous Province receive greater rights and powers, and the SFRY Constitution is one of the longest in history due to the complexity of states and peoples within them.