As Vladimir Shlapentokh's major contribution to social science, his segmented approach theory to the study of society is paramount. The segmented approach breaks with the principles of "system analysis," as formulated in the 1950s-1960s which continues to be generally unchallenged in social science. Shlapentokh contends that it is impossible to explain society with the contribution of just one theoretical model which supposes that the whole society functions according to the principles of a single system. In Shlapentokh's view, most societies are segmented and exhibit a combination of different universal social structures which existed in the past and still exist today. Shlapentokh comes up against the erroneous use of the historical approach in social analysis which supposes the permanent appearance of new social structures and the disappearance of the old ones. The term "combinatorics" is for Shlapentokh a key concept for understanding why mankind, with only a few types of social organizations, has been able to create such vast social diversity over time and space. The most important social structures include feudal, authoritarian, and liberal. Among other universal structures are religious, criminal, and anarchistic. The segmented character of society, with the coexistence and interaction of various social structures, demands the simultaneous use of multiple models of social organization (or Weberian "ideal types"). The concrete elements of society that do not fit a given model should not be seen merely as "deviations" from the system but rather as empirical evidence that more than one model is needed for the analysis. The specifics of each society are determined by the roles of social organizations and their interactions with each other. Shlapentokh applies his segmented approach to the analysis of three societies: Soviet society, post-Soviet Russia and the United States. He was one of the first to study the processes of privatization during the post-Stalin era (see: Public and Private Life of the Soviet People 1989; Soviet Ideologies in the Period of
Glasnost 1988). Among the private institutions of Soviet society, Shlapentokh paid special attention to friendship as somewhat of an antidote to the might of the Soviet state. In his book Love, Marriage, and Friendship in the Soviet Union (1984) as well as in his memoirs, An Autobiographical Narration of the Role of Fear and Friendship in the Soviet Union (2004), Shlapentokh showed how important friendship was to the everyday life of the Soviet people due to the affordances that it offered through its social network and social capital. In a book written in collaboration with historian Mikhail Loiberg and economist Roman Levita,
The Province Versus the Center in Russia: From Submission to Rebellion (1997), Shlapentokh analyzes the evolution of the feudal structure in Soviet society during the civil war and the Perestroika era when feudal tendencies were particularly strong. In his book, Contemporary Russia as a Feudal Society: A New Perspective on the Post-Soviet Era (2007), in addition to several articles first published in 1995, Shlapentokh describes three major sectors of post-Soviet Russia: liberal, authoritarian, and feudal, paying special attention to the role of the feudal segment as well to the role of the liberal sector. As he demonstrates in numerous publications on Putin's regime, the significant role of private property in post-Soviet authoritarian society makes Russia's transformation into a
totalitarian regime impossible. In his other publications, Shlapentokh, with contributions from Woods, demonstrates how all three major sector models are necessary for the study of many developments in American society, such as the relations between corporations and the government, the impact of money on the election process, private security, and the impact of personal relations on politics, among others. == The nature of totalitarian society ==