A big theme at AS is to understand how Stalin controlled the USSR. He somehow managed to run the country, with the leadership of the Party, whilst ensuring that at his death he was at the height of his power and yet still adored by the masses.
This is a big question and brings together topics that you will have already covered. The diagram below sums up the key points that answer the question. If this was an essay question, you would probably want to use the big four ideas as the sections of your essay, with the smaller details below each of the four making up the detail of each of these sections.
These notes are only brief. You will need to supplement this summary with details and examples from your other notes.