The mother of all economic systems is food production in excess of requirements to support the present population and it?s projected growth rate. In the face of climate change the most resilient food production system would be a complex web of small local production, large scale regional production, and minimal large scale trans regional production. Climate, water, and soil quantity and quality are the bedrock of this productive capacity. Externalities that impact this part of the economy must be properly valued and the costs paid by the producer of the externality.