Theoretical framework, scope of the research, and sources -- The leader and the ideology -- A centralised Yugoslavia as a solution to the Serb national question -- The formation of the Republika Srpska Krajina (RSK) and the policy of ethnic separation in Croatia -- The formation of the Republika Srpska and the policy of ethnic separation in Bosnia and Herzegovina -- The plan for Kosovo : keeping Kosovo in Serbia by changing the ethnic composition -- The unmaking of the leader.