SDP BiH based its establishment and development on the principles of European and Bosnia and Herzegovina?s Social Democracy, on peasant and worker movements, on lectures and messages of the People?s Liberation Anti-Fascist War (1941-1945), on the positive values of social development after the end of the Second World War, on the basis of reforms and democratic steps made by the Communist Party and the Alliance of Reformists of Bosnia and Herzegovina towards a multi-party system and a political and economic democracy at the end of the 80?s and the beginning of 90?s.