Labour played a central role in socialist realism, the official artistic style of the Soviet Union and other communist states. The purpose of socialist realism was to limit popular culture to a specific, highly regulated faction of emotional expression that promoted Soviet ideals. Common images used in socialist realism were flowers, sunlight, the body, youth, flight, industry, and new technology - poetic images used to show the utopianism of communism and the Soviet state.Socialist realism glorified the common worker, whether factory or agricultural, by presenting their life, work, and recreation as admirable. Its purpose was to show how much the standard of living had improved thanks to the revolution, to teach Soviet citizens how they should be acting and to improve morale. The ultimate aim was to create what Lenin called "an entirely new type of human being": The New Soviet Man. Art, especially posters and murals, was a way to instill party values on a massive scale. Stalin even described socialist realist artists as "engineers of souls".Socialist realism was required to present a highly optimistic image of life in the Soviet State. This was the crucial distinction between socialist realism and social realism, the larger movement which influenced it. Whereas social realism was often critical of the conditions it portrayed, socialist realism required artists to toe the party line in their choice and depiction of subject matter, airbrushing out the realities of hardship under Stalinist rule.