If you really think about it, money could be completely taken out of the picture of life. We obtain our resources from the earth, we don't pay the earth for giving it to us meaning we really don't have to pay for anything at all. If you look at it this way, money is just green paper worth NOTHING. It's just some way our leaders came up with to "organize" life. Think for a moment, you work at a job to get paid, if money was completely gone, you'd just be working to help the world survive. Why do we need it?
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