The political system of Bosnia and Herzegovina emerged after signature of Dayton Peace Accord in 1995, creating weak central institutions on the state level and complicated consotiational and power-sharing mechanisms. The Peace Accord, viewed as a political success by many, could not stabilize the political situation in the country, leaving many important issues unsolved. The goal of the presentation is to analyse the process of ethno-nationalization of the League of Independent Social Democrats (SNSD) as a political party with the post-communist roots. In order to provide more complex understandings, the paper also deals with the most important developments of the political system of Bosnia and Herzegovina after 1945.