Thousands of books have been written about the history of Russia in the 20th century. The same number of books have been written on the topic of the political and social structure of the USSR. By studying this literature, you can find out numerous details of how everything happened, but you cannot understand why it happened and why it happened this way and not otherwise? To answer these questions, the book examines the social dynamics of society through the structure of the dynamics of the relationship between ordinary people, marginalized people and lumpen people. This approach, applied to the history of Russia, from February 1917 to the present, allows us to understand the essence of the processes that took place and explain many historical phenomena in the USSR and in modern Russia, which are otherwise difficult to explain. For example, everyone knows about Stalin’s repressions in the USSR in the 30s. But why were they so widespread? After all, Stalin personally did not give orders for the execution or arrest of those millions of Soviet citizens who were subjected to repression - a complex mechanism of social dynamics was at work, which is described in the book.