An excellent resource delineating neurological sources of ecstatic/shamanic experience from cultural or religious influence. Winkelman takes the elitist anthropological path of shamanism into the west and turns it upside down in this groundbreaking study of shamanic experience. The texts that introduced us to shamanism in the 50s and 60s lacked transparency, sensitivity, neuroscience, and in many cases, respect. Not skirting the strengths or flaws of those early studies, Winkelman builds on them with contemporary science and insight. This text provides an informed modern perspective on a timeless animistic path. Not an easy read, though a necessary one for any student of theology, psychology, religion, and shamanism.