After World War II, Croatia became a single-party socialist federal unit of the SFR Yugoslavia, ruled by the Communists, but having a degree of autonomy within the federation. In 1967, Croatian authors and linguists published a Declaration on the Status and Name of the Croatian Standard Language demanding equal treatment for Croatian. The declaration contributed to a national movement seeking greater civil rights and redistribution of the Yugoslav economy, culminating in the Croatian Spring of 1971, suppressed by Yugoslav leadership. Still, the 1974 Yugoslav Constitution gave increased autonomy to federal units, basically fulfilling a goal of the Croatian Spring and providing a legal basis for independence of the federative constituents.