Listen now (100 mins) | This week I continue my series of psychedelic elder confessors with the great Dennis McKenna – author of the classic book, The Brotherhood of the Screaming Abyss: My Life with Terence McKenna. Dennis, the younger brother of Terence, was featured in my previous book, Psychedelic Medicine, discussing the plant medicine known in South America as ayahuasca – a potent rain forest concoction containing the active ingredient DMT.