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by Ruth DeFries
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Not long ago, the future seemed predictable. Now, certainty about the course of civilization has given way to fear and doubt.
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by Ruth DeFries
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The Big Ratchet is the story of the ratchets: the technologies and innovations, big and small, that propelled our species from hunters and gatherers on the savannahs of Africa to shoppers in the aisles of the supermarket.
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