Barry S. Levy, MD, MPH, is a physician and epidemiologist who has written and spoken extensively on the public health impacts of war and terrorism, social injustice, climate change, and environmental and occupational hazards. He has edited 20 previous books and authored more than 250 journal articles and book chapters. Dr. Levy is an Adjunct Professor of Public Health at Tufts University School of Medicine. He is a Past President of the American Public Health Association and a recipient of its most prestigious award, the Sedgwick Memorial Medal.