D. He herded millions of peasants in to cities to work in the government
Explanation:
The First Five-Year Plan also called for transforming Soviet agriculture from predominantly individual farms into a system of large state collective farms. ... Forced collectivization helped achieve Stalin's goal of rapid industrialization, but the human costs were incalculable.
Answer: I say it's because all of the citizens rule the civilization not allowing any person to overthrow one making it difficult for them to overthrow many.