There are some things that can be made robust against external change and economic swings. These are connected to the yellow ellipse Local-Commons-Coops. Of course one can buy these services from external sources rather than produce them within the neighborhood. The money spent tends to leave the community leaving it poorer than it would have been if locally produced. So each neighborhood can be configured to provide for a set of essential needs that are best taken care of by neighbors work in a shared local economy.
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