How to Change Your Mind: What the New Science of Psychedelics Teaches Us About Consciousness, Dying, Addiction, Depression, and Transcendence

by Michael Pollan

Presumably animals with a taste for altered states of consciousness have helped spread psilocybin far and wide. “The strains of a species that produced more rather than less psilocybin and psilocin would tend to be favored and so gradually become more widespread.”