Now we get specific: The people who want to take over America, you say...
Can you be more specific? And when you answer that, also tell us WHY they want to take us over? Is it perhaps envy at what we have? Because the sad part is that they could have it for themselves simply by recognizing the main difference between capitalism and communism or extreme socialism.
In capitalism there is the possibility to improve your lot in life through your own labor in a direction you choose for yourself. Self-motivated people succeed. In extreme cases of socialism and in communism, there is no incentive to improve your lot in life because you don't own or enjoy the benefits of what you do. Hell, we see that now with the USA's extended unemployment benefits, which are theorized as one reason that our economy is recovering slowly.
@conception_native_0123 - if you would study the work of Herbert Maslow (an economist from the 20th century) you would understand better the idea that motivation is incredibly important in the success of any system. Capitalism comes to the forefront by rewarding innovation or initiative.
If you want to talk about the ultimate socialism, look at ants or bees, both of which have a hive-based ecology. They are perfectly content but there is no innovation because they have no imagination. They can't dream of some particular success and strive for it. The workers go out to look for food, they bring it back to the nest. They eat. They die. The queen makes more workers. Repeat
ad infinitum. That is a perfect example of communism, but it requires brainless creatures to make it work.
Humans aren't brainless. They have dreams, aspirations, ambitions - and some of them actually DO something to make those dreams come true. But they can't do so in a society that offers no chance to "do your own thing."
Isaac said the best system is the one that keeps us free. I'll elaborate. It's the one that keeps us free to choose what we want to do so that we can develop self-motivation. We have an old adage that (I'll paraphrase) says "If you can find work that you enjoy, you will always feel successful."