Andrew Huberman interviews science writer Michael Pollan about his book A World Appears and the science and philosophy of consciousness. They explore how even plants and bacteria show sensience, how the ego and self can dissolve through psychedelics, meditation, and awe, and how consciousness may remain unexplained by brain matter alone. The conversation also covers psychedelic medicine's movement toward FDA approval and the food system's health problems.
- Pollan says we have no real understanding of how brain matter generates consciousness, and he keeps open the idea that the brain may channel rather than produce it, using the TV-receiver analogy.
- He distinguishes basic 'sensience' (responding to environmental change, which plants, bacteria, and barnacles show) from the fuller human consciousness with self-reflection and metacognition, citing Thomas Nagel's 'what is it like to be a bat?'.
- Plants can navigate mazes, respond to caterpillar sounds with defensive chemicals, and respond to the same anesthetics as animals, which Pollan treats as a loss of sensience.
- Pollan argues that feelings registered in the brain stem, per Damasio and Mark Solms, may be a more basic root of consciousness than cortical thought, and that this would extend consciousness to many more animals.
- Psychedelic and awe experiences can produce ego dissolution, which Pollan describes as a useful loosening of the defensive self, though he notes the ego still has a practical role.
- Pollan discusses caffeine: he quit it for months to study his dependence, then found his first coffee back to be a powerful experience.
- Pollan says he expects FDA approvals for psychedelics such as MDMA and psilocybin soon, with Ibogaine likely first, and he emphasizes that these should be administered with care.
- On food, he says American diets remain poor and calls for policy changes that make healthy food cheaper, noting current agricultural subsidies favor corn and soy.
Open question of consciousness
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