Promise: Rediscovering the Potential of Psychedelics and Marijuana presents a rich and broad exploration of history and culture combined with current research regarding major psychedelics: LSD, mescaline (peyote), psilocybin (magic mushrooms), DMT (ayahuasca), ibogaine, and MDMA (ecstasy), as well as marijuana. Particular emphasis is given to the application of each to address addiction, psychological disorders, mental and spiritual development, and dying and death.