No one would think to charge Starbucks Coffee with selling drugs for the caffeine it distributes every day. But David Courtwright, author of Forces of Habit: Drugs and the Making of the Modern World, says psychoactives found in alcohol, coffee and tobacco are just as much drugs as psychoactives found in opiates, marijuana and cocaine. Robert Siegel talks to David Courtwright about the book. (9:30) Forces of Habit is published by Harvard University Press, March 2001.
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