For all that nature is based on, dependent on, carefully formed patterns, repeating order, an efficiency of structure, it is invariably a lack of pattern, order or structure, a randomness and serendipity, that brings about the most fundamental changes, that drives developments in individuals, populations, communities, societies. And for all that the human spirit is naturally drawn to, and naturally delights in, carefully formed patterns, repeating order, and efficiency of structure, do we
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