Stan Grof, MD, PhD

Ralph Metzner PhD

Brigitte Grof

Fritjof Capra, Ph.D.

Rupert Sheldrake, Ph.D.

Paul Grof, PhD

Richard Tarnas, PhD

Michael Harner, PhD

Rick Doblin Ph.D.

Becca Tarnas, PhD

Yvonne Smith Tarnas, PhD

Robin Carhart-Harris, PhD

George Sarlo

Jack Kornfield, PhD

Jill Purce

Sean Kelly, PhD

Maria Mangini, PhD

Susan Mokelke

Bill Melton

Susan Hess Logeais

Susan Hess Logeais

Stan Grof

Brigitte Grof

Mitch Schultz

Susan Hess Logeais