How did the combination of fear and propaganda stalin maintain power

It maintained his status as the leader of the USSR.

Explanation: Well, it can be multiple answers, but this is the most obvious one. If he gave fear towards his citizens, they would know who is the boss, that means Stalin. Propaganda helped Stalin maintain his image, showing the populace that he is a kind and respectful leader who does what is best for the people. In reality, we know that's not all true, but this all maintained his status as the leader of the USSR.

first paragraph (and busy all the night ,with a silence deep and white )