I refuted this pages and pages ago. The aim of individuals, in any system, is to externalize their costs onto others.
And in a minority of cases the "invisible hand" works to ensure that they in fact benefit others. The problem is that this is the exception rather than the rule, as is evidenced by the mass of laws and enforcement agencies that every developed society enjoys.
In the most important fields of human interest, the "invisible hand" works to destroy rather than create, as is evidenced by our sad record on the environment and our trouble feeding ourselves among other things.
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