I would like to express my deep appreciation to the many people who offered assistance with the writing of The World of Shamanism. Exceptionally valuable feedback came from Timothy White and Ken Wilber.
Other people who contributed to this project in various ways include William Andrew, Allyn Brodsky, Etzel Cardena, Marlene Dobkin de Rios, Steve Donovan, Betty Sue Flowers, Gordon Globus, Maria Globus, Tom Hurley, Stan Krippner, John Levy, Michael Murphy, Patrick Ophals, Don Sandner, Bruce Scotton, Deane Shapiro, Huston and Kendra Smith, John White, and Michael Winkelman. Members of a Psychiatry Residents Seminar at the University of California at Irvine who gave valuable feedback include Gary Bravo, Melissa Derfler, Charles Grob, Diane Harris, Barbara Kaston, Mitch Liester, Jim McQuade, Pat Poyourow, Susan Seitz, Ken Steinhoff, and Nathan Thuma.
Special thanks to several people who were exceptionally generous with their time, feedback, and assistance. These include Angeles Arrien, Kent Carroll, Michael Harner, Arthur Hastings, Chris Kiefer, Charles Tart, and, as always, Frances Vaughan. Bonnie L’Allier provided her usual excellent administrative and secretarial support, ably assisted by Hann Wang.