The Revolution Betrayed

The Revolution Betrayed: What is the Soviet Union and Where is it Going? (Russian: Преданная революция: Что такое СССР и куда он идет?, romanized: Predannaya revolyutsiya: Chto takoye SSSR i kuda on idet?) is a book published in 1936 by the former Soviet leader Leon Trotsky.

The book criticized the Soviet Union's actions and development following the death of Vladimir Lenin in 1924. The book is regarded as Trotsky's primary work dealing with the nature of Stalinism and socialist democracy. The book was written by Trotsky during his exile in Norway and was originally translated into Spanish by Victor Serge. The most widely available English translation is by Max Eastman.

Trotsky also argued in the book for the restoration of the right of criticism in areas such as economic matters, the revitalization of trade unions and free elections of multiple Soviet parties. Trotsky further contended that the excessive totalitarianism under Stalin had undermined the potential development of the Soviet Union.