Stalin was the ruler of the USSR and therefore had no superior.
Stalin took over after Lenin died, in spite of Lenin's warning not to let him do so.
Stalin was Lenin's successor, even though Lenin didn't actually like Stalin much. Before that, Stalin had been in charge of the Communist Party's administration.
Stalin was for a communism government. A totalitarian government where he could be dictator and be in charge of what every one under him did.
Stalin was too paranoid to name a second in command but the nearest equivalent would be Lavrentiy Beria who was in charge of the NKVD which was the secret police .
Joseph Stalin was in charge of Russia.
Joseph Stalin himself was never a soldier, although he was commander-in-chief for the Second World War and played a part in the Russian Civil War, but not as a psychical soldier. He was drafted into the First World War, but was denied for service due to a permanant arm injury.
Josef Stalin was in charge of the USSR from 3 April 1922 until 5 March 1953.
The USSR did while Stalin was in charge.
A situation where nobody is in charge. It usually applies when a dictator like Stalin dies and nobody is ready or able to take his place.
Yes, most all of Stalin's biographers note that Stalin's father beat both Stalin and Stalin's mother.
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No, Stalin was not a Freemason.