Wherever I go and ask people what is missing from their lives, the most common answer (if they are not impoverished or seriously ill) is "community." What happened to community, and why don't we have it any more? There are many reasons – the layout of suburbia, the disappearance of public space, the automobile and the television, the high mobility of people and jobs – and, if you trace the "why's" a few levels down, they all implicate the money system.
More directly posed: community is nearly impossible in a highly monetized society like our own. That is because community is woven from gifts, which is ultimately why poor people often have stronger communities than rich people. If you are financially independent, then you really don't depend on your neighbors – or indeed on any specific person – for anything. You can just pay someone to do it, or pay someone else to do it.
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I believe it was Karl Marx who first pointed out that monetary exchange objectifies labor, so that commoditization results in the alienation of workers from their fruits, thereby destroying the basis of community in social interaction as impersonal markets replace interpersonal relationship.