The Concentration/Diffusion Pattern represents distinction making, the foundational essence of duality within systems. Concentration/Diffusion demonstrates the importance of concentrated, interconnected centers of production, creativity and exchange that are supported by and in turn support surrounding areas of less concentrated activity, but more abundant, resources. Concentration/Diffusion must be balanced so that, on the one hand, concentrated nodes of activity are formed to increase overall activity, but, on the other hand, these nodes must provide the outputs of that increased activity to nurture the more diffuse regions that supply them.