Project. The goal was to analyze the effects of psilocybin on human subjects (first prisoners, and later Andover Newton Theological Seminary students) from a synthesized version of the drug, one of two active compounds found in a wide variety of hallucinogenic mushrooms, including Psilocybe mexicana. Psilocybin was produced in a process developed by Albert Hofmann of Sandoz Pharmaceuticals, who was famous for synthesizing LSD. Beat poet Allen Ginsberg heard about the Harvard research project and asked to join. Leary was inspired by Ginsberg's enthusiasm, and the two shared an optimism that psychedelics could help people discover a higher level of consciousness. They began introducing psychedelics to intellectuals and artists including Jack Kerouac, Maynard Ferguson, Charles Mingus and Charles Olson. Concord Prison Experiment Leary argued that psychedelic substances—in proper doses, a stable setting, and under the guidance of psychologists—could benefit behavior in ways not easily obtained by regular therapy. He experimented in treating alcoholism and reforming criminals, and many of his subjects said they had profound mystical and spiritual experiences that permanently improved their lives. The Concord Prison Experiment evaluated the use of psilocybin and psychotherapy in the rehabilitation of released prisoners. Thirty-six prisoners were reported to have repented and sworn off criminality after Leary and his associates guided them through the psychedelic experience. The overall recidivism rate for American prisoners was 60%, whereas the rate for those in Leary's project reportedly dropped to 20%. The experimenters concluded that long-term reduction in criminal recidivism could be effected with a combination of psilocybin-assisted group psychotherapy (inside the prison) along with a comprehensive post-release follow-up support program modeled on Alcoholics Anonymous. Dissension over studies The Concord conclusions were contested in a follow-up study on the basis of time differences monitoring the study group vs. the control group and differences between subjects re-incarcerated for parole violations and those imprisoned for new crimes. The researchers concluded that statistically only a slight improvement could be attributed to psilocybin, in contrast to the significant improvement reported by Leary and his colleagues. Rick Doblin suggested that Leary had fallen prey to the Halo Effect, skewing the results and clinical conclusions. Doblin further accused Leary of lacking "a higher standard" or "highest ethical standards in order to regain the trust of regulators". Ralph Metzner rebuked Doblin for these assertions: "In my opinion, the existing accepted standards of honesty and truthfulness are perfectly adequate. We have those standards, not to