90% of the world's adults consume some form of caffeine everyday, making it the most widely used psychoactive drug on Earth. Michael Pollan, author of "This Is Your Mind On Plants," explains why. Michael goes into the history of coffee drinking, breaking down its origins and how it benefits humankind.

"For more on caffeine and psychopharmacology, read Michael Pollan's latest book THIS IS YOUR MIND ON PLANTS:
https://www.penguinrandomhouse.com/bo..."

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