CONCEPTUAL FOUNDATIONS OF THEORY OF THE SECOND DEMOGRAPHIC TRANSITION

The article examines the theory of the Second Demographic Transition (SDT) and its main elements, which help to explain modern socio-demographic processes. This theory is related both to changes in purely demographic changes and to institutional, ideological shifts in modern society. It is emphasized that the theory of the second demographic transition takes into account different variations of changes occurring in the family and demographic sphere. The purpose of this article is to analyze the conceptual elements that underlie the theory of the second demographic transition. The VOSviewer software was used to provide a broader coverage of scientific works concerning the theory of the second demographic transition and to identify its concepts. This tool made it possible to effectively search the world's research in the field of SDT and graphically present its main elements. On the basis of the results obtained it was revealed that the attention of the theory of the second demographic transition is most focused on the conceptualization of changes in such spheres as marriage, family, fertility, cohabitation and divorce. The theory of the second demographic transition has a high conceptual significance in the context of manifesting uncertainty in the development of society, which significantly affects the demographic behavior of the population. Its explanatory and analytical capabilities allow for a deeper understanding of contemporary demographic changes, which can improve the effectiveness of population policy. Key words: second demographic transition, family, marriage, fertility, cohabitation.