Form Stalin's point of view there were considerable strengths to the USSR in 1941 and the defeat of Nazi Germany in 1945 confirmed this opinion.
Stalin had created a personal dictatorship centred on him.
This was partially due to his own lust for power but also held a genuine conviction that he was the one person who had the vision and the ability to bring about true socialism in Russia.
The majority of weaknesses of the Soviet Union in 1941 concerned the suffering of the people.
Stalin thought these were necessary sacrifices to ensure the survival of socialism in a hostile world and for many Russians, the defeat of Nazi Germany served as sufficient justification.
There are even stories of prisoners in the gulags cheering Stalin's name when news of the final victory in 1945 was reported.
Historians have the benefit of hindsight so they can hold a more objective viewpoint.
The political and economic system which Stalin created stifled initiative and suppressed creativity.
It also brough suffering to the Russian people on a scale never experienced before.
Collectivisation saddled the USSR with an inefficient and unproductive agricultural system.
The command economy was ultimately unable to compete with the capitalist systems in the West.
The political system became stagnant and conservative and was incapable of reforming itself.
The "Stalin Revolution" produced heroic successes as many people were better off materially and had opportunities they would have never had under the tsarist regime.
But it also produced a fearful society in which arrests and trials had a terrible impact on human relationships.
Life was hard and millions died or were repressed by an authoritarian regime.