Below are the best resources we could find featuring ralph metzner about human potential.
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Ralph Metzner, circa 1966, discussing the use of yoga to integrate the LSD experience into normal life.
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A conversation with Ralph Metzner about his book, The Expansion of Consciousness, and his reflections on questions that touch on the most profound problems we face for our survival, our existence as a species.
Seven Phases of Socio-Cultural Transformation The Discovery of the consciousness-expanding substance LSD at the height of WWII synchronistically coincided with the invention of nuclear weaponry.