The Soviet Union was not greatly affected by the Great Depression, which was an economic downturn that occurred primarily in the industrialized countries of the Western world, including the United States, Europe, and Japan, in the 1930s. One reason for this is that the Soviet Union was a planned economy, in which the government played a central role in economic decision-making and resource allocation. This allowed the Soviet government to implement policies that aimed to insulate the economy from external shocks and to maintain economic stability.
Additionally, the Soviet Union was not as integrated into the global economy as many other countries, and therefore was not as directly affected by the economic downturns occurring in other parts of the world. The Soviet Union also had a relatively low level of international trade, which further reduced its exposure to the global economic downturn.
Finally, the Soviet Union implemented a number of economic policies during the 1930s that helped to stimulate economic growth and maintain employment levels, such as increasing government spending on infrastructure projects and implementing price controls. These policies likely helped to mitigate the impact of the Great Depression on the Soviet Union.