The aim of this thesis is to highlight the characteristics of Serbian nationalism through the actions and advocacy of members of certain well-known Serbian political parties. These characteristics and the nature of their advocacy are mainly evident in the opposition's stance towards the ruling party or coalition. The work begins with an examination of terminology, providing explanations of the key terms used in the thesis: nation, ideology, nationalism. This serves as a foundation leading into the discussion of the Greater Serbian ideology, which outlines its fundamental features: authoritarianism and nationalism. The manifestation of this ideology is presented through Svetosavian nationalism, a right-wing political ideology combining Serbian nationalism and Orthodox clericalism, which emerged in the 1930s and was significantly influenced by the Orthodox bishop Nikolaj Velimirović. The party system in Serbia illustrates the extent to which elements of Greater Serbian politics can be found within certain parties as well as among voters. Consequently, the thesis also examines some of the extraparliamentary extremist groups that are believed not to share Serbian traditional values. The work specifically highlights the activities and actions of organizations such as Dveri - the Movement for the Life of Serbia and the Serbian Party Zavetnici. Additionally, the thesis reflects on the current political situation in Serbia and the presence of Greater Serbian ideology in political life.