The Revolution Betrayed is one of the most important Marxist texts of all time. It is the only serious Marxist analysis of what happened to the Russian Revolution after the death of Lenin. In this book, Trotsky provided a brilliant and profound analysis of Stalinism, which has never been improved upon, let alone superseded. With a delay of 60 years, it was completely vindicated by history. Without a thorough knowledge of this work, it is impossible to understand the reasons for the collapse of the Soviet Union and the events since then in Russia and on a world scale.