Dennis McKenna

Dennis McKenna is the psychedelic researcher and brother to the late Terence McKenna who pioneered the use of plants as away to positively alter human consciousness. Dennis and Terence blazed the trail for modern psychedelic experimentation as part of a group known as the Brotherhood of the Screaming Abyss and they regard ayahuasca and other plant medicines not as drugs but as teachers.


  • Born – December 17, 1950, Paonia, Colorado, United States
  • Best known for: pioneering work with psychedelics
  • Book:
    • The Brotherhood of the Screaming Abyss

The Brotherhood of The Screaming Abyss

The Brotherhood of the Screaming Abyss was a group of Berkeley students who went down to Columbia in the early seventies in search of dimethyltryptamine (DMT).

If you have been following London Real from the beginning, then you will know that psychedelics and plant medicines played a big part in my journey over the past eight years. And that Dennis McKenna and his late brother Terence McKenna have been influential and pivotal in my journey with this medicine.

Dennis also accompanied me to Costa Rica where we had three ayahuasca ceremonies and is featured in our feature-length documentary film “Reconnect”.

Plant Medicines & Psychedelic Research

Both Terence and Dennis come from a different age in many respects, an age when spirituality, music, literature and drugs all went hand in hand, and when being called a rebel was still a compliment. Forming a formidable team, Terence was the learned preacher, and Dennis was the researcher.

The two would travel to America, and the world bringing the gospel of mind enhancement through natural plants. Both of them committed their lives to the idea that the reality we see is nothing like the true reality beyond our senses.

Like his late brother, Dennis McKenna is a very articulate, humorous and kind soul, who will immediately win the trust of any of you sceptics out there.

Dennis has a perspective on the mind and its relationship to culture which is informative and revelatory and I’m so grateful for my time with Dennis as he’s been an incredible teacher.

Join us as we discuss:

  • Mushrooms, ayahuasca and DMT
  • Michael Pollan, Graham Hancock, and a heroic dose of psilocybin
  • Gaia, symbiosis, and archeology
  • Peruvian Shamans, psilocybin kits, and Ayahuasca visions
  • The Time Wave Theory, La Chorrera, and MDMA
  • Terence McKenna’s death, and brain tumour treatment
  • The Brotherhood of The Screaming Abyss and what it was like in the 1980’s researching plant medicines

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