Hitler believed that before monotheism and the Jewish ethical vision came along, the world operated according to the laws of nature and evolution: survival of the fittest. The strong survived and the weak perished. When the lion hunts the herd the young, the sick and weak are always the first victims. Nature is brutal but nature is balanced. There is no mercy. So too in antiquity-the great empires-the Babylonians, Greeks and Romans conquered, subjugated and destroyed other peoples. They respected no borders and showed no mercy. This too Hitler viewed as natural and correct. But in a world operating according to a Divinely-dictated ethical system—where a God-given standard applies and not anyone’s might—the weak did not need to fear the strong. As Hitler saw it, the strong were emasculated-this was neither normal nor natural and in Hitler’s eyes, the Jews were to blame.
Josef Mengele (/ˈmɛŋɡələ/; German: [ˈmɛŋələ]; 16 March 1911 – 7 February 1979) was a German Schutzstaffel (SS) officer and physician in Auschwitz concentration camp during World War II. He performed deadly human experiments on prisoners and was a member of the team of doctors who selected victims to be killed in the gas chambers. Arrivals that were judged able to work were admitted into the camp, while those deemed unsuitable for labor were sent to the gas chambers to be killed. With Red Army troops sweeping through Poland, Mengele was transferred 280 kilometers (170 mi) from Auschwitz to the Gross-Rosen concentration camp on 17 January 1945, just ten days before the arrival of the Soviet forces at Auschwitz. After the war, he fled to South America where he evaded capture for the rest of his life.