How Effective Was Terror in Controlling the People of the USSR in the Period 1929 to 1941?

Stalin, the "Man of Steel" is known for his use of terror during his legendary rule. He was the kind of leader that would stop at almost nothing to accomplish his goals. "Stalin is a Genghis Kahn, an unscrupulous intriguer, who sacrifices everything else to the preservation of power....He changes his theories to whom he needs to get rid of".
Through his 5 year plans, Stalin introduced Collectivisation into the rural parts of Russia to control the peasants and Industrialization in urban areas to control the workers. …