Not really, I believe there are ways around that.
The biggest problems with real communist nations is that they get invaded or crushed by governments early on. It was Franco who won the Spanish Civil War, but what would have happened if the Anarchists won? What about if the Paris Commune took over the bank and survived till today?
Then you have the diggers in 1649. http://en.wikipedia.org/wiki/Diggers
You have back in pre-history, you have indian tribes, you have all sorts of living examples around the world.
There is the other problem that communism is pretty pacifist ideology. As a whole, they don't have standing armies, so when big military machines come along, they are at a disadvantage. By producing a state army, and producing state control and all these other measures, they stop becoming communist.
Communism isn't a new idea, it is a very old one. However, communists aren't Empire builders. Hence, in theory, you would need the World-Wide Revolution to overthrow all the possible enemies and threats.
This also goes into this fact, how did the "mainstream communism" examples such as the USSR survive? They had the largest military force on Earth, they used totalitarian practises. This things are not what communism is, they are people hijacking the bandwagon.
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