Key Vocabulary and Key Figures. Key VocabularyCollective FarmsCommand EconomyPurgeNew Economic PolicyPolitburoComintern. Key FiguresLeon TrotskyJoseph Stalin. History Revisited. The Soviet Union is made up of 15 Republics led under a policy of War CommunismThe Russian Economy worsened to Pre-WWI levels and Lenin Drafts the New Economic PolicyThe NEP loosened the control of communism and allowed free trade and free enterprise.