"The world has a way of undermining complex plans. This is particularly true in fast moving environments. A fast moving environment can evolve more quickly than a complex plan can be adapted to it. By the time you have adapted, the target has changed."

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During cycles long anterior to the creation of the human race, and while the surface of the globe was passing from one condition to another, whole races of animals-each group adapted to the physical conditions in which they lived-were successively created and exterminated.

— Roderick Murchison