Every day, twins were selected for experimentation. He would require that they give blood and sometimes so much was drawn that a twin would faint. Some underwent huge blood transfusions from one twin to the other. In an attempt to change their eye color, he painfully injected chemicals into their eyes, only to result in infection. One night he collected 7 sets of twins with different colored eyes, killed them, dissected them, and then sent the eyes to von Verschuer for analysis. Twins as young as 5 were killed from experiments, then their bodies dissected. For one pair of twins, he attempted to create conjoined twins by sewing their backs together and trying to connect blood vessels and organs. A few days after the extremely painful process, the twins developed gangrene and died. Many twins had their limbs and organs removed without the use of an anesthetic. Other experiments included isolation endurance, reactions to various stimuli, spinal taps without anesthesia, the removal of sexual organs, and incestuous impregnations. Out of the 1500 twins experimented on by Mengele, only around 200 survived the horror.
Racial-Morphological Examinations of the Anterior Portion of the Lower Jaw in Four Racial Groups. This dissertation, completed in 1935 and first published in 1937, earned him a PhD in anthropology from Munich University. In this work Mengele sought to demonstrate that there were structural differences in the lower jaws of individuals from different ethnic groups, and that racial distinctions could be made based on these differences.[7][121]
Under the Nuremberg Laws, Jews became routine targets for stigmatization and persecution. This culminated in Kristallnacht, or the “night of broken glass” in November 1938, when German synagogues were burned and windows in Jewish shops were smashed; some 100 Jews were killed and thousands more arrested. From 1933 to 1939, hundreds of thousands of Jews who were able to leave Germany did, while those who remained lived in a constant state of uncertainty and fear.
In his 1965 essay "Command and Compliance", which originated in his work as an expert witness for the prosecution at the Frankfurt Auschwitz Trials, the German historian Hans Buchheim wrote there was no coercion to murder Jews and others, and all who committed such actions did so out of free will. Buchheim wrote that chances to avoid executing criminal orders "were both more numerous and more real than those concerned are generally prepared to admit",[468] and that he found no evidence that SS men who refused to carry out criminal orders were sent to concentration camps or executed.[469] Moreover, SS rules prohibited acts of gratuitous sadism, as Himmler wished for his men to remain "decent"; acts of sadism were carried out on the initiative of those who were either especially cruel or wished to prove themselves ardent National Socialists.[468] Finally, he argued that those of a non-criminal bent who committed crimes did so because they wished to conform to the values of the group they had joined and were afraid of being branded "weak" by their colleagues if they refused.[470]

Anti-Semitism in Europe did not begin with Adolf Hitler. Though use of the term itself dates only to the 1870s, there is evidence of hostility toward Jews long before the Holocaust–even as far back as the ancient world, when Roman authorities destroyed the Jewish temple in Jerusalem and forced Jews to leave Palestine. The Enlightenment, during the 17th and 18th centuries, emphasized religious toleration, and in the 19th century Napoleon and other European rulers enacted legislation that ended long-standing restrictions on Jews. Anti-Semitic feeling endured, however, in many cases taking on a racial character rather than a religious one.

Twins were subjected to weekly examinations and measurements of their physical attributes by Mengele or one of his assistants.[49] The experiments he performed on twins included unnecessary amputation of limbs, intentionally infecting one twin with typhus or some other disease, and transfusing the blood of one twin into the other. Many of the victims died while undergoing these procedures,[50] and those who survived the experiments were sometimes killed and their bodies dissected once Mengele had no further use for them.[51] Nyiszli recalled one occasion on which Mengele personally killed fourteen twins in one night by injecting their hearts with chloroform.[31] If one twin died from disease, he would kill the other twin to allow comparative post-mortem reports to be produced for research purposes.[52]
Back in Germany, years of pent-up hatred toward the Jews was finally let loose on the night that marks the actual beginning of the Holocaust. The Night of Broken Glass (Kristallnacht) occurred on November 9/10 after 17-year-old Herschel Grynszpan shot and killed Ernst vom Rath, a German embassy official in Paris, in retaliation for the harsh treatment his Jewish parents had received from Nazis.
The logistics of the mass murder turned Germany into what Michael Berenbaum called a "genocidal state".[34] Eberhard Jäckel wrote in 1986 that it was the first time a state had thrown its power behind the idea that an entire people should be wiped out.[h] Anyone with three or four Jewish grandparents was to be exterminated,[36] and complex rules were devised to deal with Mischlinge ("mixed breeds": half and quarter Jews).[37] Bureaucrats identified who was a Jew, confiscated property, and scheduled trains to deport them. Companies fired Jews and later used them as slave labor. Universities dismissed Jewish faculty and students. German pharmaceutical companies tested drugs on camp prisoners; other companies built the crematoria.[34] As prisoners entered the death camps, they were ordered to surrender all personal property, which was catalogued and tagged before being sent to Germany for reuse or recycling.[38] Through a concealed account, the German National Bank helped launder valuables stolen from the victims.[39]
In 1933 Anne’s family—her father, Otto; her mother, Edith; and her older sister, Margot—moved to Amsterdam from Germany following the rise of Adolf Hitler. In 1940 the Netherlands was invaded by Germany, which began to enact various anti-Jewish measures, one of which required Anne and her sister to enroll in an all-Jewish school the following year. On June 12, 1942, Anne received a red-and-white plaid diary for her 13th birthday. That day she began writing in the book: “I hope I will be able to confide everything to you, as I have never been able to confide in anyone, and I hope you will be a great source of comfort and support.” The following month Margot received an order to report to a labour camp. Facing arrest if she did not comply, the family went into hiding on July 6, 1942, moving into a “secret annex” at Otto’s business in Amsterdam, the entrance to which was soon hidden behind a moveable bookcase. The Franks were later joined by four other Jews—Hermann and Auguste van Pels and their son, Peter, and Fritz Pfeffer—and were aided by several friends, including Miep Gies, who brought food and other supplies.
Czeslawa Kwoka, age 14, appears in a prisoner identity photo provided by the Auschwitz Museum, taken by Wilhelm Brasse while working in the photography department at Auschwitz, the Nazi-run death camp where some 1.5 million people, most of them Jewish, died during World War II. Czeslawa was a Polish Catholic girl, from Wolka Zlojecka, Poland, who was sent to Auschwitz with her mother in December of 1942. Within three months, both were dead. Photographer (and fellow prisoner) Brasse recalled photographing Czeslawa in a 2005 documentary: "She was so young and so terrified. The girl didn't understand why she was there and she couldn't understand what was being said to her. So this woman Kapo (a prisoner overseer) took a stick and beat her about the face. This German woman was just taking out her anger on the girl. Such a beautiful young girl, so innocent. She cried but she could do nothing. Before the photograph was taken, the girl dried her tears and the blood from the cut on her lip. To tell you the truth, I felt as if I was being hit myself but I couldn't interfere. It would have been fatal for me." #
His “obsession,” as he afterward called it—partly in mockery of the opposition his later views evoked—had its beginning in those repeated scenes of piled-up bodies as he investigated camp after camp. From then on, he could be said to carry the mark of Abel. He dedicated himself to helping the survivors get to Mandate Palestine, a goal that Britain had made illegal. In 1946, he reported from Tel Aviv on the uprising against British rule, and during the next two years he produced a pair of films on the struggles of the survivors to reach Palestine. In 1950, he published “In Search,” an examination of the effects of the European cataclysm on his experience and sensibility as an American Jew. (Thomas Mann acclaimed the book as “a human document of high order, written by a witness of our fantastic epoch whose gaze remained both clear and steady.”) Levin’s intensifying focus on the Jewish condition in the twentieth century grew more and more heated, and when his wife, the novelist Tereska Torres, handed him the French edition of the diary (it had previously appeared only in Dutch) he felt he had found what he had thirsted after: a voice crying up from the ground, an authentic witness to the German onslaught.
In 1950, the Dutch translator Rosey E. Pool made a first translation of the Diary, which was never published.[26] At the end of 1950, another translator was found to produce an English-language version. Barbara Mooyaart-Doubleday was contracted by Vallentine Mitchell in England, and by the end of the following year, her translation was submitted, now including the deleted passages at Otto Frank's request. As well, Judith Jones, while working for the publisher Doubleday, read and recommended the Diary, pulling it out of the rejection pile.[27] Jones recalled that she came across Frank's work in a slush pile of material that had been rejected by other publishers; she was struck by a photograph of the girl on the cover of an advance copy of the French edition. "I read it all day", she noted. "When my boss returned, I told him, 'We have to publish this book.' He said, 'What? That book by that kid?'" She brought the diary to the attention of Doubleday's New York office. "I made the book quite important because I was so taken with it, and I felt it would have a real market in America. It's one of those seminal books that will never be forgotten", Jones said.[28] The book appeared in the United States and in the United Kingdom in 1952, becoming a best-seller. The introduction to the English publication was written by Eleanor Roosevelt.
Anne Frank escaped gassing. One month before liberation, not yet sixteen, she died of typhus fever, an acute infectious disease carried by lice. The precise date of her death has never been determined. She and her sister, Margot, were among three thousand six hundred and fifty-nine women transported by cattle car from Auschwitz to the merciless conditions of Bergen-Belsen, a barren tract of mud. In a cold, wet autumn, they suffered through nights on flooded straw in overcrowded tents, without light, surrounded by latrine ditches, until a violent hailstorm tore away what had passed for shelter. Weakened by brutality, chaos, and hunger, fifty thousand men and women—insufficiently clothed, tormented by lice—succumbed, many to the typhus epidemic.
Transportation between camps was often carried out in freight cars with prisoners packed tightly. Long delays would take place; prisoners might be confined in the cars on sidings for days.[190] In mid-1942 work camps began requiring newly arrived prisoners to be placed in quarantine for four weeks.[191] Prisoners wore colored triangles on their uniforms, the color of the triangle denoting the reason for their incarceration. Red signified a political prisoner, Jehovah's Witnesses had purple triangles, "asocials" and criminals wore black and green. Badges were pink for gay men and yellow for Jews.[192] Jews had a second yellow triangle worn with their original triangle, the two forming a six-pointed star.[193][194] In Auschwitz, prisoners were tattooed with an identification number on arrival.[195]
He was capable of being so kind to the children, to have them become fond of him, to bring them sugar, to think of small details in their daily lives, and to do things we would genuinely admire ... And then, next to that, ... the crematoria smoke, and these children, tomorrow or in a half-hour, he is going to send them there. Well, that is where the anomaly lay.[48]