Climate no longer controls us as severely as Montesquieu and Buckle supposed, but it limits us. Man’s ingenuity often overcomes geological handicaps: he can irrigate deserts and air-condition the Sahara; he can level or surmount mountains and terrace the hills with vines; he can build a floating city to cross the ocean, or gigantic birds to navigate the sky. But a tornado can ruin in an hour the city that took a century to build; an iceberg can overturn or bisect the floating palace and send a thousand merrymakers gurgling to the Great Certainty. Let rain become too rare, and civilization
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