Roland Griffiths (PhD) is a Professor of Neuropsychopharmacology of Consciousness, and Director of the Centre for Psychedelic and Consciousness research at Johns Hopkins University School of Medicine in Baltimore, U.S. His research has focused on the behavioural pharmacology of mood-altering drugs including caffeine, sedative hypnotics, and for the last 20 years, psilocybin. His landmark study: Psilocybin can occasion mystical experiences having substantial and sustained personal meaning and spiritual significance, had a significant impact on subsequent investigations into the effects of psilocybin, as well as on raising awareness around psychedelic research.