Would Communism work in the modern age?

Would Communism work in the modern age?
If you look back at history, Communism has never been achieved in any country before. Russia was socialist, Cuba is socialist but not one country has achieved Communism. If Communism was achieved, it would mean that there would be no government and that all citizens would already have learnt to share and work together. Would a Communist country be as successful as a capitalist country? Why would Communism work or not work? Discuss and post your thoughts here
 
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