Dr. J. Christian Greer is a scholar of psychedelic spirituality, who currently occupies a postdoctoral position at Harvard University’s Center for the Study of World Religions. His forthcoming book, Angelheaded Hipsters: Psychedelic Militancy in Nineteen Eighties North America (Oxford University Press), analyzes the growth, diversification, and expansion of psychedelic culture within fanzine networks of the late Cold War era.