Quote 18

"Looked at from the network point of view, survival depends on routings that provide better use of resources - for example, re-circulation of water and biocarbon in an ecosystem, or an improved multiplier effect for cash flow in an economy. Inside a network community, it is these routings that are favoured. As a consequence, the tags that determine these routings become persistent features of the community. Persistent tags, in turn, become building blocks for for further changes, and consequently, the source of new hierarchical organizations. In this process, the throughput from lower-level niches largely determines the nature of interactions between higher-level niches - persistent lower-level niches with higher throughput have more influence on the overall organization." - John Holland, Complexity