this led to his imprisonment. Đilas was pardoned in 1966. Yugoslavism campaign At the 7th Congress of the SKJ held in 1958, the party became more centralised. This was achieved by largely revoking decision-making powers previously given to republican branches of the SKJ. The party programme published at the Congress praised emerging Yugoslav consciousness and a series of articles was published advocating creation of unified Yugoslav culture. This decision built on introduction of the option of declaring one's ethnicity as Yugoslav in the 1953 census, and the régime-sponsored 1954 Novi Sad Agreement on the single Serbo-Croatian language. Thus launched Yugoslavism campaign sought to replace federalism with unitarism. Ranković became the most prominent advocate of the campaign. He sought support from the League of Communists of Bosnia and Herzegovina (, SKBiH) and from the League of Communists of Montenegro (, SKCG) – with some success in the latter. In 1963, Serbia and Montenegro concluded several agreements on strengthening economic and cultural ties, including construction of the Belgrade–Bar railway. The campaign was publicly criticised through an exchange of letters published in Borba. The proponents of the campaign, largely ethnic Serbs, were accused of scheming to abolish republics and resurrect Greater Serbian chauvinism. Particular opposition came from the League of Communists of Croatia (, SKH) and the League of Communists of Macedonia (, SKM). They were joined in an informal national-liberal coalition by the League of Communists of Slovenia (, ZKS) and, in a less prominent role, by the leadership of Vojvodina. In early 1963, Tito was compelled to publicly warn about chauvinism and reassure non-Serbs that merger of nations was not contemplated while defending the concept of Yugoslavism. Finally, at the 8th Congress of the SKJ held in 1964, Tito and Kardelj gave speeches criticising those thinking about merging nations of Yugoslavia as proponents of bureaucratic centralisation, unitarism and hegemony. There was no further mention of Yugoslavism at the Congress and the republican branches of the SKJ were given back their decision-making powers to reflect specificities and national character of the republics. The 8th Congress thus abandoned Yugoslavism in favour of decentralisation. The SKJ promoted the notion of "Yugoslav socialist patriotism". The concept was described by its advocates as the feeling or awareness and love of the socialist self-management community. According to the SKJ, the concept was unrelated to nationalism and ethnicity. The notion was also claimed to support values and traditions