In this introduction, the author contextualises the research into social stratification in Serbia as a long-term project on the transformation of class structure in that country. The researchers in this project have established how the systemic transformation in Serbia unfold- ed, doubly conditioned by the more general European processes of postsocialist transforma- tion and the specific conditions in Serbia. The surveys on representative samples of the adult population in the whole of Serbia were conducted in 2003/2004, 2012 and 2018. The author lays out the methodological basis and the contents of the studies included in the special issue