Ben Sessa takes the reader on a journey through the fascinating history of psychedelic plants and chemicals, examining their role in human culture from prehistory to modern times. Based on a thorough review of scientific evidence, he makes a clarion call for a reevaluation of their clinical potential with appropriate setting in scientific research, psychiatry, psychotherapy, and personal growth. First published in 2012, Psychedelic Renaissance has been extensively revised and expanded to incorporate the extraordinary developments in research into psychedelics over the intervening years.