Slobodan Milošević was a Yugoslav and Serbian politician who was the President of Serbia (originally the Socialist Republic of Serbia, a constituent republic within the Socialist Federal Republic of Yugoslavia) from 1989 to 1997 and President of the Federal Republic of Yugoslavia from 1997 to 2000. He also led the Socialist Party of Serbia from its foundation in 1990. He rose to power as Serbian President after he and his supporters claimed the need to reform the 1974 Constitution of Yugoslavia due to both the marginalization of Serbia and its political incapacity to deter Albanian separatist unrest in the province of Kosovo.