The Road to Eleusis
Book
A 1978 book by R. Gordon Wasson, Albert Hofmann, and Carl Ruck, which proposed that the ancient Greeks consumed a psychedelic potion in the Eleusinian Mysteries.
Mentioned in 2 videos
Videos Mentioning The Road to Eleusis

The Best Kept Secret In History?: A Conversation with Brian Muraresku (Episode #346)
Sam Harris
A 1978 book by R. Gordon Wasson, Albert Hofmann, and Carl Ruck, which proposed that the ancient Greeks consumed a psychedelic potion in the Eleusinian Mysteries.

Lessons from ~4,500 LSD Sessions and Beyond | Stan Grof | The Tim Ferriss Show (Podcast)
Tim Ferriss
A book by Albert Hofmann, Gordon Wasson, and Karl Ruck, suggesting that a psychedelic potion (kykeon) made of ergot was key to the Eleusinian Mysteries.