The example of a choir can help illustrate the sense of complexity. If all the singers sing exactly the same notes in the same way, this would be rigidity—a boring, but loud, output of sounds. If each member of the choir sings totally independently of one another, this would be cacophony and chaos. Complexity, the path between these two extremes, is the same as harmony. Harmony emerges when differentiation and linkage unfold over time. That’s our definition of integration. And so complex systems self-organize in an optimal way by linking differentiated elements to each other. The subjective
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