No. No large-scale implementation of communism—defined as a stateless, classless, moneyless society—has ever been achieved or sustained. Historical Marxist-Leninist states (USSR, Maoist China, Cuba, etc.) delivered early gains in literacy, industrialization, and some social metrics but consistently faced chronic shortages, stifled innovation, authoritarian rule, famines, and repression, leading to collapse, mass emigration, or market reforms. Small experiments also proved unsustainable. Outcomes reflect real-world incentive and coordination challenges, not just "not real communism."