Dr. Rudolf Virchow, one of the founders of scientific medicine, said that "Medicine is a social science, and politics is nothing more than medicine on a large scale." Beyond caring for the sick, doctors have played an important role in calling attention to the social determinants of health. International physicians for the prevention of nuclear war (IPPNW) played a pivotal role in the cessation of atmospheric nuclear weapons testing at the height of the cold war. This anti-weapons activism later came to be directed towards civilian nuclear energy by the likes of anti-nuclear crusader Dr. Helen Caldicott who is well known for her unwillingness to back up her outlandish claims with scientific evidence. Doctors for Nuclear Energy is a new international group of physicians who argue that nuclear energy is a keystone technology for the elimination of air pollution and CO2 emissions. Co-founders Dr. Van Der Merwe and Dr. Keefer share their perspectives on relative risk assessment, radiophobia and its public health consequences and our clean energy future.