The article advocates updating the research concerning divided societies and complexly organized states. It addresses the genesis and advancement of complex identities of social actors and political agency. The discussion focuses on the correlation between the structuration and content saturation of identities. The use of operational interfaces from fundamental distinctions to various kinds of divides, demarcations and polarizations leaves still unresolved the problem of qualitative parameters of identities, and ways to represent and analyze them. Innovative approaches developed by Russian political scientists take into account the relationship between the processes of world development and the identity of its development drivers and agency from individual political actors to complex social movements. The article shows that the effective deployment of the respective research program requires not only external accounting of the temporal parameters, but full integration of modern evolutionary approaches into their methodology. It is necessary to overcome the usual interpretations of identity in the singular as an abstract universal idea. Equally it is necessary to move to the study of the complex interaction of the acting forces of development and the formation of a dynamic flow of individual and mutual identifications in the plural. To this end, it is suggested not only to update the Rokkanian paradigm of demarcations by expanding the set of distinctions and making the whole structure more dynamic, but also to use the possibilities of extended evolutionary synthesis.