Stalin transformed the Soviet Union into a totalitarian state by taking control over the economy with his Five Year Plan and being such a strong, powerful, and influential speaker.
Stalin wanted improve things like industry, and farm output. To help make for heavy industry he provided those who did well with bonuses and punished those who didn't. Even though industry rose, the standard of living wasn't good. Stalin wanted workers in the city to have food from farmers so he pushed agriculture. He moved peasants to collectives which caused problems. Many peasants revolted against Stalin because of this.