My source is irrelevent, as are all conclusions in a debate. Tell me, what is communism, then? What's wrong with my reasons? Is communism not "from each according to his ability, to each according to his need?" Does communism not put the "good of the people" and the "good of the community"(where it gets its name from) above the individual? Does communism not demand that each individual contribute "his fair share" to the community? Please, tell me where I'm wrong.

The problem with absolutely pure capitalism is that it in practice always puts the rich over the poor. They won't let the government make a policy that hurts them. FDA for instance is against pure capitalism. So are minimum wage laws, child labor laws, basic health and safety laws etc. Under pure cpitalism such laws could never possibly exist.
First off, child labor laws are not for or against capitalism. I concede the rest.
Secondly, capitalism only favors the rich if you deem that money is the standard with which you must judge a person's value.

On the other hand under communist systems, what you think is yours isn't up to and including your own body and mind. You can't protest an unfair policy without jail time. You just found the cure for cancer. Great! now it belongs to the People's Republic of Bendover, and the glorious state will distrubute the cure to the masses. Of course you won't get any reward for it. And you still will work in the same dirty old hospital as before.
I just have to say: The People's Republic of Bendover is brilliant.

Pure systems never work because people tend to try to get power for themselves and not worry about other people. So if you have a beautiful theory, it will never work. Societies just don't work that way. So the best solution seems to be in the middle somewhere.
Pure capitalism doesn't work because people hold that their lives are less meaningful without money, and more meaningful with it. People define their lives with external values - which devalues their life. If people viewed their lives as ends in and of themselves, than capitalism is the perfect system.