 After World War II, Croatia became a single-party socialist federal unit of the SFR Yugoslavia, ruled by the Communists, but enjoying 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 greater autonomy for the Croatian language.The declaration contributed to a national movement seeking greater civil rights and decentralization of the Yugoslav economy, culminating in the Croatian Spring of 1971, suppressed by Yugoslav leadership.