Since I have visited a communist country (USSR - Russia and Ukraine), and having friends who are refugees from communist rule, I can say for certain the following things:
1. Communist theory and practice is highly unrealistic. It is a fundamental denial of nature, a "pure hive" mentality. To quote my friend from Romania, "communism cannot work because it not all people WANT to be equal". Nobody on this board can deny this fact. Period. We are not worker bees. We are individuals. Deserving the same basic rights does NOT mean that that is ALL we should have. And that is exactly what communism says.
2. After visiting Russia and Ukraine, I saw the way people in communist countries lived first hand. It is a bleak existence. Their world is a world through black and white glasses. Their hopes and dreams are all reduced to meeting the needs of the state. Since everything basic is provided to them, and the prospect of having more is quelled by the state, their own desires to be more is quelled. There is little to no individual glory. Expressions of individuality are non-conformist and severely frowned upon at best. There is no free speech. The government and bureaucracy running the economy is so horribly inefficient that even the basics never get done in any realistic time frame. They ALL viewed the west as a land of unlimited opportunity, where they could be and do and go wherever and whatever and whenever and however and for whatever reason they wanted to. Outsiders and visitors were coralled to the usual spots but were discouraged from taking in the sites by themselves.
3. All my friends who were in communist countries have said the same thing - they would never EVER go back. For all the bad that exists in our society today, it completely pales in comparison to what they had back home. One friend of mine completed his Ph.D. here in North America and is a professor in NY state. He makes more money in one year than he would've ever seen in his lifetime in Czechoslovakia, has far more research opportunities than he would've ever had, and he has the freedom to do what he wants. He knows that he will not starve to death, nor will he be unhoused no matter what, simply because a basic safety net exists in our society. But he has the opportunity to be and do more than just meet his needs.
And now, let's compare the US economy to any economy in Europe. Who has done better or built more than the US in Europe? NOBODY. The prevailing European socialist attitudes are holding people back. Taxes ramp up quickly when a person makes more money, so they don't WANT to make more. Why would they, unless they could make ridiculous amounts to offset the taxes paid back to the government? If communism demonstrated anything, it's that the more government involvement there is in an economy, the worse things get. As for the failures of privatization in Europe, it is quite obvious WHY: because the taxes and incentives for business to do better are NOT there, and because overunionization and the attitude of the citizens who are socialist believe that they should be protected cradle-to-grave by the state and its regulations. It can't BE like that. Even companies like Airbus can't compete without signficant government subsidies both direct and indirect against companies like Boeing. Rather than let the companies keep more money by lowering taxes, the state collects the money and then doles it back. By this process, they are making the system more inefficient through a bureaucracy which first takes the money and then gives it back. This is NOT to say that the US is perfect (e.g. health insurers should not cancel on people with serious health ailments and nobody should be uninsured either), but the US is much closer to what SHOULD be economically than where Europe is. The EU will help somewhat, but they will NEVER be as competitive or strong as the US is in their current form.
But I must say, the most entertaining portion of this thread is that the same people who have in the past mentioned how Darwinism in nature is king also claim that Communism is a correct society. You know you are contradicting yourselves, don't you? Nature doesn't guarantee equality, and neither should a government. But as a civilized society, we can still provide some basics for those who simply can't without quelling the dreams of those who want more. Those who won't and don't want to be more should NOT be burdened by those who can and want to be more.