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Of all the things humans rely on plants for--sustenance, beauty, fragrance, flavor, fiber--surely the most curious is our use of them is to change consciousness: to stimulate or calm, fiddle with or completely alter, the qualities of our mental experience. Take coffee and tea: people around the world rely on caffeine to sharpen their minds. We don't usually think of caffeine as a drug, or our daily use as an addiction, because it is legal and socially acceptable. So then what is a "drug?" And why, for example, is making tea from the leaves of a tea plant acceptable, but making tea from a seed head of an opium poppy a federal crime? In THIS IS YOUR MIND ON PLANTS, Michael Pollan dives deep into three plant drugs -- opium, caffeine, and mescaline -- and throws the fundamental strangeness, and arbitrariness, of our thinking about them into sharp relief.



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