Michael Pollan's latest work looks at your mind on plants — specifically, three psychoactive plants. In the follow-up to his 2018 bestseller, How to Change Your Mind — What the New Science of Psychedelics Teaches Us About Consciousness, Dying, Addiction, Depression, and Transcendence, he says it wasn't just coal that fueled the Industrial Revolution, but caffeine. Alongside opium and mescaline, caffeine features prominently in his new book, "This Is Your Mind on Plants."He talks to us about a new wave of interest in the psychedelic drug revolution; its complexities, cultural significance, and how these mind-bending substances change how we see ourselves and each other.Want to support 1A? Give to your local public radio station and subscribe to this podcast. Have questions? Find us on Twitter @1A.