Josef Rudolf Mengele (16 March 1911 – 7 February 1979) was a German SS officer, physician and war criminal best known for conducting medical experiments on prisoners at Auschwitz during the Holocaust. As an SS doctor, he selected deportees for forced labor or death and carried out brutal experiments on twins, children and people with physical abnormalities. His actions earned him the nickname "Angel of Death" and made him one of the most infamous perpetrators of Nazi medical crimes.
Early Life and Education
Josef Rudolf Mengele was born on 16 March 1911 in Günzburg, Bavaria, into a wealthy and conservative Catholic family. His father, Karl Mengele, owned a successful agricultural machinery company, giving the family a prominent position within the town. Mengele was an intelligent student and developed an early interest in anthropology, medicine, genetics and racial theory.
He studied philosophy, medicine and anthropology at the universities of Munich, Vienna and Frankfurt. In 1935 he earned a doctorate in anthropology, followed by a medical degree in 1938. During his studies, Mengele became increasingly influenced by eugenics and racial ideology, ideas that later became central to Nazi racial policy.
Academic Career and Racial Research
After completing his studies, Mengele joined the Institute for Hereditary Biology and Racial Hygiene in Frankfurt. There he worked under Professor Otmar von Verschuer, one of Germany's leading racial theorists and geneticists. Mengele focused on heredity, twins, genetic disorders and physical abnormalities. His research reflected the growing influence of racial hygiene within German academic circles during the 1930s. The theories he studied would later form the basis of the pseudo-scientific experiments he conducted at Auschwitz. His academic achievements and research credentials helped him gain recognition within both medical and Nazi Party circles.
Personal Life
Josef Mengele married Irene Schönbein in 1939. The couple had one son, Rolf Mengele, who was born in 1944. Their marriage deteriorated during and after the war, eventually ending in divorce in 1954. In 1958, while living in South America under a false identity, Mengele married Martha Mengele, the widow of his brother Karl. Despite years spent in hiding, he remained in contact with members of his family in Germany, who continued to provide financial support and assistance.
Rise Within the Nazi Party and SS
Mengele joined the National Socialist German Workers' Party (NSDAP) in 1937 and became a member of the Schutzstaffel (SS) in 1938. His academic work in racial hygiene and genetics aligned closely with Nazi ideology and helped advance his career. During the early years of the Second World War, Mengele served as a medical officer in the Waffen-SS. He saw combat on the Eastern Front and was wounded in action.
For his military service, he received the Iron Cross 2nd Class in 1941 and the Iron Cross 1st Class in 1942. After being declared unfit for further front-line service due to his injuries, he was transferred to duties within the concentration camp system.
Auschwitz and Nazi Crimes
In May 1943, Mengele was assigned to the Auschwitz concentration and extermination camp in occupied Poland. There he became one of the most infamous SS doctors of the Holocaust. Mengele conducted selections on arriving deportation transports, deciding which prisoners would be used for forced labor and which would be sent directly to the gas chambers. Survivors frequently described him standing on the railway platform calmly determining life or death with a simple gesture of his hand.
Although Mengele became the most famous Auschwitz doctor, he was only one of several SS physicians involved in selections, medical experiments and the administration of the camp.
Medical Experiments
At Auschwitz, Mengele carried out brutal and unethical medical experiments on prisoners, particularly twins, dwarfs and people with physical abnormalities. His research focused on heredity, racial theory and attempts to increase the German birth rate. Prisoners were subjected to amputations, blood transfusions, injections, deliberate infections, sterilization procedures and numerous other experiments without anesthesia or consent. Many victims suffered permanent injuries, while countless others died as a direct result of these procedures.
Twins were of particular interest to Mengele because he believed they could unlock the secrets of heredity and racial reproduction. Twins arriving at Auschwitz were separated from other prisoners and used in extensive experiments involving repeated measurements, blood tests, injections with unknown substances and comparative medical examinations. Many children died during the experiments or were murdered afterward so their bodies could be dissected and studied.
Eva Mozes Kor and the Twin Experiments
One of the best-known survivors of Mengele's experiments was Eva Mozes Kor, who arrived at Auschwitz in May 1944 together with her twin sister, Miriam Mozes. Their parents and older sisters were murdered shortly after arrival, while the twins were selected for Mengele's research program.
Eva later described prolonged examinations, injections and medical abuse carried out on the twins. After the war, she dedicated much of her life to educating the public about the Holocaust and Mengele's crimes. She founded the CANDLES Holocaust Museum and Education Center and worked to locate and support other surviving twins. Her testimony remains one of the most important firsthand accounts of the medical experiments conducted at Auschwitz.
The "Angel of Death"
Thousands of prisoners died as a result of Mengele's experiments or were murdered once they were no longer considered useful for research. His calm demeanor during selections and his willingness to experiment on children contributed to his reputation as one of the most feared figures in Auschwitz. Following the war, he became widely known as the "Angel of Death", a nickname that reflected both his role in selections and the suffering inflicted upon his victims.
Flight from Justice
As Nazi Germany collapsed in 1945, Mengele fled westward and was briefly detained by United States forces. Because he was not immediately identified as an Auschwitz doctor, he was released. In 1949, he escaped to Argentina using a false identity and assistance from Nazi escape networks commonly known as "ratlines". He later moved to Paraguay and eventually Brazil.
West German authorities issued arrest warrants, and international investigations continued for decades. Despite repeated reports of sightings throughout South America, Mengele successfully avoided capture for the remainder of his life.
Death
Josef Mengele died on 7 February 1979 near Bertioga, Brazil, after suffering a stroke while swimming. He was buried under a false name, and his true identity remained uncertain for several years. In 1985, forensic investigators exhumed the remains and conducted examinations that conclusively identified them as those of Josef Mengele. As a result, one of the most extensive international manhunts of the post-war era officially came to an end.
Historical Significance
Josef Mengele remains one of the most notorious perpetrators of the Holocaust. His medical experiments at Auschwitz became a symbol of Nazi medical crimes and demonstrated how science and medicine could be corrupted by racial ideology and totalitarian rule.
The revelations of Nazi medical atrocities after the war contributed directly to the development of modern international medical ethics, including the Nuremberg Code, which established principles concerning human experimentation and informed consent.
