Until the early 20th century (1905) Russia was ruled by a monarchy.
In 1905 there was a Revolution to put an end to monarchy and an Interim Government took place, with a variety of Left-winged parties (the Czar was replaced by State).
Later, in October 1917, another revolution took place later, one that gave the power to Lenin and his Bolshevik party. Lenin wanted to build Communism with the ideas of Marxism-Leninism through Socialism: the State wanted to implant the idea of total equality between the soviet people and the dismissal of State’s power to lead the society.
Behind the concept of Communism was the main idea that a country worked better all by itself: the human condition limited the overall production and led people to work as much as they could and consume only the essential for living. In this model, a concept such as money is not present.
This process had to happen naturally, and without the state’s interference, however, for this to happen it was necessary to alter people’s minds.
Socialism is a condition of communism, but this is only a utopia so it’s impossible to achieve.
The Bolshevik party wanted to achieve this at all costs, and this turned the whole system into a totalitarian regime which was, obviously, negative because all opponents to the system were killed or repressed. The State had all power and was able to control the whole economy (in a positive, but also in a negative way). Even though the State had a plan and could forecast inflation by controlling the price level and the quantities available, planned economies were not as effective as market economies.
USSR was going through an enormous modernization