Another problem with communism was the bolsheviks.
(I truly believe we would have seen a different kind of communism had the Mensheviks prevailed over the bolsheviks,since their enitre attitude towards it was different (let's take things slowly & convince the people that our ideas might be right instead of ******* them upon a large majority of the people at gunpoint, which is essentially what the bolsheviks did...)
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Most other communist countries were heavily influenced by Russia, even China (although it did manage to develop a semi-independent system, it's basis was still Russian).