Reflections on demographic theories

Abstract The article presents the author's reflections on theories in general and demographic theories in particular. The epidemiological transition, i.e. periodization of changes in the structure of causes of death, proposed by A.R. Omran in 1971 and later raised to the rank of theory, is taken as an example. The author points out the insufficiency of Omran's concept to explain the contemporary mortality trends and suggests possible directions of theorizing that would enable correlating the new stage of life expectancy growth with the notion of "epidemiological transition"