Since 1986, Physicians for Human Rights (PHR) has used medicine and science to document and call attention to mass atrocities and severe human rights violations. PHR was founded on the idea that physicians, scientists, and other health professionals possess unique skills that lend significant credibility to the investigation and documentation of human rights abuses. PHR’s specialized expertise is used to advocate for persecuted health workers, prevent torture, document mass atrocities, and hold those who violate human rights accountable. PHR’s work focuses on the physical and psychological effects of torture and sexual violence, the forensic documentation of attacks on civilians, the unnecessary and excessive use of force during civil unrest, and the protection of medical institutions and health professionals working on the frontline of human rights crises.