The history of the Soviet Union between 1927 and 1953, commonly referred to as the Stalin Era or the Stalinist Era, covers the period in Soviet history from the establishment of Stalinism through victory in the Second World War and down to the death of Joseph Stalin in 1953. Stalin sought to destroy his enemies while transforming Soviet society with central planning, in particular through the forced collectivization of agriculture and rapid development of heavy industry. Stalin consolidated his power within the party and the state and fostered an extensive cult of personality. Soviet secret-police and the mass-mobilization of the Communist Party served as Stalin's major tools in molding Soviet society. Stalin's methods in achieving his goals, which included party purges, ethnic cleansings, political repression of the general population, and forced collectivization, led to millions of deaths: in Gulag labor camps and during famine.

World War II, known as "the Great Patriotic War" by Soviet historians, devastated much of the USSR, with about one out of every three World War II deaths representing a citizen of the Soviet Union. In the course of World War II, the Soviet Union's armies occupied Eastern Europe, where they established or supported Communist puppet governments. By 1949, the Cold War had started between the Western Bloc and the Eastern (Soviet) Bloc, with the Warsaw Pact (created 1955) pitched against NATO (created 1949) in Europe. After 1945, Stalin did not directly engage in any wars, continuing his totalitarian rule until his death in 1953.

The mobilization of resources by state planning expanded the country's industrial base. From 1928 to 1932, pig iron output, necessary for further development of the industrial infrastructure rose from 3.3 million to 6.2 million tons per year. Coal production, a basic fuel of modern economies and Stalinist industrialization, rose from 35.4 million to 64 million tons, and the output of iron ore rose from 5.7 million to 19 million tons. A number of industrial complexes such as Magnitogorsk and Kuznetsk, the Moscow and Gorky automobile plants, the Ural Mountains and Kramatorsk heavy machinery plants, and Kharkiv, Stalingrad and Chelyabinsk tractor plants had been built or were under construction.

In real terms, the workers' standards of living tended to drop, rather than rise during industrialization. Stalin's laws to "tighten work discipline" made the situation worse: e.g., a 1932 change to the RSFSR labor law code enabled firing workers who had been absent without a reason from the workplace for just one day. Being fired accordingly meant losing "the right to use ration and commodity cards" as well as the "loss of the right to use an apartment″ and even blacklisted for new employment which altogether meant a threat of starving. Those measures, however, were not fully enforced, as managers were hard-pressed to replace these workers. In contrast, the 1938 legislation, which introduced labor books, followed by major revisions of the labor law, was enforced. For example, being absent or even 20 minutes late were grounds for becoming fired; managers who failed to enforce these laws faced criminal prosecution. Later, the Decree of the Presidium of the Supreme Soviet, 26 June 1940 "On the Transfer to the Eight-Hour Working Day, the Seven-day Work Week, and on the Prohibition of Unauthorized Departure by Laborers and Office Workers from Factories and Offices" replaced the 1938 revisions with obligatory criminal penalties for quitting a job (2–4 months imprisonment), for being late 20 minutes (6 months of probation and pay confiscation of 25 per cent), etc.

Based on these figures, the Soviet government declared that the Five Year Industrial Production Plan had been fulfilled by 93.7% in only four years, while parts devoted to the heavy industry parts were fulfilled by 108%. Stalin in December 1932 declared the plan success to the Central Committee since increases in the output of coal and iron would fuel future development.

During the Second Five-Year Plan (1933–1937), on the basis of the huge investment during the first plan, the industry expanded extremely rapidly and nearly reached the plan's targets. By 1937, coal output was 127 million tons, pig iron 14.5 million tons, and there had been very rapid development of the armaments industry.

While making a massive leap in industrial capacity, the First Five Year Plan was extremely harsh on industrial workers; quotas were difficult to fulfill, requiring that miners put in 16- to 18-hour workdays. Failure to fulfill quotas could result in treason charges. Working conditions were poor, even hazardous. Due to the allocation of resources for the industry along with decreasing productivity since collectivization, a famine occurred. In the construction of the industrial complexes, inmates of Gulag camps were used as expendable resources. But conditions improved rapidly during the second plan. Throughout the 1930s, industrialization was combined with a rapid expansion of technical and engineering education as well as increasing emphasis on munitions.

From 1921 until 1954, the police state operated at high intensity, seeking out anyone accused of sabotaging the system. The estimated numbers vary greatly. Perhaps, 3.7 million people were sentenced for alleged counter-revolutionary crimes, including 600,000 sentenced to death, 2.4 million sentenced to labor camps, and 700,000 sentenced to expatriation. Stalinist repression reached its peak during the Great Purge of 1937–1938, which removed many skilled managers and experts and considerably slowed industrial production in 1937.