Peter A. Levine, PhD, has spent 45 years studying and treating stress and trauma. He holds a doctorate degree in medical biophysics from the University of California at Berkeley and in psychology from International University. He is the developer of Somatic Experiencing®, a naturalistic approach to healing trauma. He has practiced and taught at treatment centers, hospitals, and pain clinics throughout the world, and has dealt with a wide range of trauma, including accidents, rapes, assaults, abuse, and invasive medical procedures. Peter was a stress consultant for NASA during the development of the Space Shuttle program. He served with the Institute for World Affairs Task Force for "Psychologists for Social Responsibility" and the American Psychological Association "Presidential Initiative on Responding to Large-Scale Disasters and Ethno-Centric Warfare." He is also the bestselling author of