Like the network of concentration camps that followed, becoming the killing grounds of the Holocaust, Dachau was under the control of Heinrich Himmler, head of the elite Nazi guard, the Schutzstaffel (SS), and later chief of the German police. By July 1933, German concentration camps (Konzentrationslager in German, or KZ) held some 27,000 people in “protective custody.” Huge Nazi rallies and symbolic acts such as the public burning of books by Jews, Communists, liberals and foreigners helped drive home the desired message of party strength.
On July 17, 1941, four weeks after the invasion of the Soviet Union, Hitler tasked SS chief Heinrich Himmler with responsibility for all security matters in the occupied Soviet Union. Hitler gave Himmler broad authority to physically eliminate any perceived threats to permanent German rule. Two weeks later, on July 31, 1941, Nazi leader Hermann Goering authorized SS General Reinhard Heydrich to make preparations for the implementation of a "complete solution of the Jewish question."
“You want to know about my motivation, don't you? Well. It is the kind of sentiments anyone would have when he actually sees refugees face to face, begging with tears in their eyes. He just cannot help but sympathize with them. Among the refugees were the elderly and women. They were so desperate that they went so far as to kiss my shoes, Yes, I actually witnessed such scenes with my own eyes. Also, I felt at that time, that the Japanese government did not have any uniform opinion in Tokyo. Some Japanese military leaders were just scared because of the pressure from the Nazis; while other officials in the Home Ministry were simply ambivalent.

The next year, 1942, marked the beginning of mass murder on a scale unprecedented in all of human history. In January, fifteen top Nazis led by Reinhard Heydrich, second in command of the SS, convened the Wannsee Conference in Berlin to coordinate plans for the Final Solution. The Jews of Europe would now be rounded up and deported into occupied Poland where new extermination centers were being constructed at Belzec, Sobibor, Treblinka, and Auschwitz-Birkenau.
According to a news article in the Quad-City Times, Yanina Cywinska survived the gas chamber at Auschwitz when she was 10 years old. Cywinska presented the Geifman Lecture in Holocaust Studies at the Augustana College in Rock Island, IL on April 11, 2005, sharing her firsthand account of the atrocities that she endured as a prisoner in Auschwitz and later at Dachau.
11 of Hitler’s deputies were given death sentences, including Goering, the most senior surviving Nazi. However he too committed suicide the night before he was due to hang. Others received prison terms. Albert Speer, Hitler's personal architect, was released in 1966 and spent his remaining years writing about the Nazi regime, donating most of his royalties to Jewish charities. Rudolph Hess committed suicide in prison in 1987. Many Nazis evaded justice altogether and were never tried.
By the fall of 1948, Mengele had made up his mind to leave Germany and build a life elsewhere. Argentina was the preferred choice of sanctuary. There was a groundswell of Nazi sympathy in Argentina. And his father, Karl Sr., who owned a firm that manufactured agricultural equipment, thought that though his company had no branches in Argentina, he had made several business connections there that Josef might develop.
He acted instantly. He sent Otto Frank a copy of “In Search” and in effect offered his services as an unofficial agent to secure British and American publication, asserting his distance from any financial gain; his interest, he said, was purely “one of sympathy.” He saw in the diary the possibility of “a very touching play or film,” and asked Frank’s permission to explore the idea. Frank at first avoided reading Levin’s book, saturated as it was in passions and commitments so foreign to his own susceptibilities. He was not unfamiliar with Levin’s preoccupations; he had seen and liked one of his films. He encouraged Levin to go ahead—though a dramatization, he observed, would perforce “be rather different from the real contents” of the diary. Hardly so, Levin protested: no compromise would be needed; all the diarist’s thoughts could be preserved.
In 1935, Mengele earned a PhD in anthropology from the University of Munich.[7] In January 1937, he joined the Institute for Hereditary Biology and Racial Hygiene in Frankfurt, where he worked for Dr. Otmar Freiherr von Verschuer, a German geneticist with a particular interest in researching twins.[7] As von Verschuer's assistant, Mengele focused on the genetic factors that result in a cleft lip and palate, or a cleft chin.[10] His thesis on the subject earned him a cum laude doctorate in medicine (MD) from the University of Frankfurt in 1938.[11] (Both of his degrees were revoked by the issuing universities in the 1960s.)[12] In a letter of recommendation, von Verschuer praised Mengele's reliability and his ability to verbally present complex material in a clear manner.[13] The American author Robert Jay Lifton notes that Mengele's published works were in keeping with the scientific mainstream of the time, and would probably have been viewed as valid scientific efforts even outside Nazi Germany.[13]