The main goal of this book is to show the fundamental fallacy of Marxist theory, which in fact is the basis of the left democratic and socialist movements in Europe, USA and other capitalist countries. It was achieved by simple methods that are understandable to the ordinary reader. They are based on clear theoretical conclusions. Many of them are confirmed by the author's own experience at various stages of his life in the USSR, built exactly on Marxist theory. The first part of the work provides evidence of the falsity of the main components of Marxism-economy and recommended social structure, which should be the dictatorship of the proletariat. Marx's theory, in practice, has led to millions of senseless deaths during the Russian Revolution of 1917 which was then followed by many years of terror. The second part of the book critically explores the problems of modern democracy; exploiting the ambiguity of the basic notions of democracy: freedom and equality. There is an explanation of what the meaning of freedom really is now. In connection with it the incompatibility of Islamism with Western values is described, as well as the terrible harm from the lie of political correctness. Even worse is the demagogic notion of equality. The examples given on this topic lead to the conclusion that inequality much more accurately conveys the essence of human relations and is an accelerator of progress.