Donella Meadows came up with a list of 12 leverage points, places in complex systems (like cities, companies, environments, etc.) where making small changes can result in big shifts. The Wikipedia page contains a summary of her points. Aside from the obvious usage in city planning and environmental policymaking, I wonder if game designers (like Will Wright) have utilized Meadows' list in constructing their virutal complex systems. (via migurski)
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