Even though Stalin’s victory in the power struggle was partly due to his popular policies, it was not just this that allowed Stalin also because of the mistakes made by other rivals and factors that played into his hands. For example Trotsky was a former menshevik which helped Stalin accuse him of not been a true Bolshevik.
There are many reasons that suggest Stalin’s victory in the power struggle was because his popular policies. For example Stalin’s popular policy of Socialism in one country put the needs of the USSR first, this was particularly popular because the conditions for the majority of the Russian people was unthinkable as extreme poverty was common for the average Russian in the the early 20th Century. It was a lot more popular than Trotsky's idea of World revolution, which would have seen many of the resources owned by the USSR sent abroad to try spread the Communist revolution abroad in other countries. Stalin developed his idea in Socialism in one Country because he did not like Trotsky. Stalin recognised that Trotsky’s policy was over optimistic and unpopular. The First World War and the civil war had destroyed the Russian economy and Stalin’s policy showed faith in the soviet people, almost portraying that Stalin believed in the Russian people. Stalin portrayed the Worldwide revolution as a policy that put the needs of other countries before those of the Russian people. Trostsky’s Jewish background marked him as a disloyal outsider among many party members anyway, and his international policy only seemed to confirm that he was not loyal to the people of Russia.
It was not just his popular policies that saw Stalin replace Lenin as the leader of the USSR. It was also partly due to the mistakes and weaknesses made by the other leading Bolsheviks such as Trotsky. Trotsky was seen as too powerful because he was the leader