Mengele fled Germany to Argentina in 1948, using false documents given to him by the Red Cross. (According to the Mossad’s file, the organization was aware that it was helping a Nazi criminal escape justice.) In Buenos Aires, he lived at first under an assumed name, but later reverted to his own name. He even had a nameplate on his door: Dr. Josef Mengele.
In October 1941 the Nazis began turning the concentration camp at Majdanek into a death camp as well. They then began the construction of killing centres at Bełżec, Treblinka, near Warsaw, and at Sobibór. The first mass gassing of Jews began in Chelmno on 8 December 1941, when the Nazis used gas vans to murder people from the Łódź ghetto. The Nazis also ordered the expansion of the Auschwitz camp complex to increase the capacity for murder.
In his monograph, The Origins Of The Final Solution: The Evolution of Nazi Jewish Policy, September 1939 – March 1942, Christopher Browning argues that Nazi policy toward the Jews was radicalized twice: in September 1939, when the invasion of Poland implied policies of mass expulsion and massive loss of Jewish lives; and in spring 1941, when preparation for Operation Barbarossa involved the planning of mass execution, mass expulsion, and starvation – to dwarf what had happened in Jewish Poland.[113]

Three SS officers socialize at Auschwitz in 1944. From left to right: Richard Baer (commandant), Dr. Josef Mengele and Rudolf Höss (former commandant). Baer escaped but was captured in 1960; he died in 1963 while awaiting trial. Höss was executed for his crimes in 1947, shortly after receiving the sacrament of penance and Holy Communion as Viaticum. Mengele died while swimming at a seaside resort in 1979, after having lived to see his work at Auschwitz vindicated by the legalization of abortion in the U.S. and elsewhere. (Karl-Friedrich Höcker, public domain, via Yad Vashem and Wikimedia Commons)
After Otto was unable to find a publisher, the work was given to historian Jan Romein, who was so impressed that he wrote about the diary in a front-page article for the newspaper Het Parool in 1946. The resulting attention led to a publishing deal with Contact, and Het Achterhuis was released on June 25, 1947. An immediate best seller in the Netherlands, the work began to appear elsewhere. In 1952 the first American edition was published under the title Anne Frank: The Diary of a Young Girl; it included an introduction by Eleanor Roosevelt. The work was eventually translated into more than 65 languages, and it was later adapted for the stage and screen. All proceeds went to a foundation established in Anne’s honour. In 1995, 15 years after Otto’s death, a new English version of the Diary was published. It contained material that had been previously omitted. In an effort to extend the copyright date—which was to begin expiring in various European countries in 2016—Otto was added as a coauthor in 2015.
Systematic examinations of rescuers have actually shown a high degree of heterogeneity among individuals. Rescuers came from divergent social backgrounds, varied widely in terms of political and religious involvements, and displayed different levels of friendship and animosity toward Jews. None of these variables has turned out to be a reliable predictor of the sort of person who was more or less likely to rescue Jews.

After learning of plans to collect diaries and other papers to chronicle people’s wartime experiences, Anne began to rework her journal for possible publication as a novel entitled Het Achterhuis (“The Secret Annex”). She notably created pseudonyms for all the inhabitants, eventually adopting Anne Robin as her alias. Pfeffer—whom Anne had come to dislike as the two often argued over the use of a desk—was named Albert Dussel, the surname of which is German for “idiot.”

Resistance also occurred inside the death camps. At Treblinka, Jewish inmates staged a revolt in August 1943, after which Himmler ordered the camp dismantled. At Sobibor, a big escape occurred in October 1943, as Jews and Soviet POWs killed 11 SS men and broke out, with 300 making it safely into nearby woods. Of those 300, most were hunted down and only fifty survived. Himmler then closed Sobibor. At Auschwitz-Birkenau, Jewish Sonderkommandos managed to destroy crematory number four in October 1944.
Within one week from the start of Operation Barbarossa, Heydrich issued an order to his Einsatzkommandos for the on-the-spot execution of all Bolsheviks, interpreted by the SS to mean all Jews. One of the first indiscriminate massacres of men, women, and children in Reichskommissariat Ukraine took the lives of over 4,000 Polish Jews in occupied Łuck on 2–4 July 1941, murdered by Einsatzkommando 4a assisted by the Ukrainian People's Militia.[55] Formed officially on 20 August 1941, the Reichskommissariat Ukraine – stretching from prewar east-central Poland to Crimea – had become operational theatre of the Einsatzgruppe C. Within the Soviet Union proper, between 9 July 1941 and 19 September 1941 the city of Zhytomyr was made Judenfrei in three murder operations conducted by German and Ukrainian police in which 10,000 Jews perished.[41] In the Kamianets-Podilskyi massacre of 26–28 August 1941 some 23,600 Jews were shot in front of open pits (including 14,000–18,000 people expelled from Hungary).[41][56] After an incident in Bila Tserkva in which 90 small children left behind had to be shot separately, Blobel requested that Jewish mothers hold them in their arms during mass shootings.[57][58] Long before the conference at Wannsee, 28,000 Jews were shot by SS and Ukrainian military in Vinnytsia on 22 September 1941, followed by the 29 September massacre of 33,771 Jews at Babi Yar.[41][59] In Dnipropetrovsk, on 13 October 1941 some 10,000–15,000 Jews were shot.[60] In Chernihiv, 10,000 Jews were put to death and only 260 Jews were spared.[60] In mid-October, during the Krivoy-Rog massacre of 4,000–5,000 Soviet Jews the entire Ukrainian auxiliary police force actively participated.[61] In the first days of January 1942 in Kharkiv, 12,000 Jews were murdered, but smaller massacres continued in this period on daily basis in countless other locations.[60] In August 1942 in the presence of only a few German SS men over 5,000 Jews were massacred in Polish Zofjówka by the Ukrainian Auxiliary Police leading to the town's complete sweep from existence.[62]
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]