"The idea was to have a basin inverted on his head and his hair cut to the shape of it. Skill and money were not needed. Then the idea grew that it was more convenient to leave the basin on his head. Stray thoughts were trimmed along with stray hair; brain-vines, tentacles of thought, were not encouraged to wander. Then, in the interests of human economy, the head of adaptable man became a basin of uniform shape—a basin, a crash helmet. Safe at last; no more thought-cuts."

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Man wants to see nature and evolution as separate from human activities. There is a natural world, and there is man. But man also belongs to the natural world. If he is a ferocious predator, that too is part of evolution. If cod and haddock and other species cannot survive because man kills them, something more adaptable will take their place. Nature, the ultimate pragmatist, doggedly searches for something that works. But as the cockroach demonstrates, what works best in nature does not always appeal to us.

— Mark Kurlansky