The property is of adequate size to ensure the complete representation of the features and processes that convey its significance. Potential threats to the integrity of the property include the difficulty in preserving the memory of the events and their significance to humanity. In the physical sphere, significant potential threats include natural decay of the former camps’ fabric; environmental factors, including the risk of flooding and rising groundwater level; changes in the surroundings of the former camps; and intensive visitor traffic.
Nazi comes from the German word for National Socialist (Nationalsozialistische). A Nazi is a person who believes in the ideologies and practices of the National Socialist German Workers' Party (Nationalsozialistische Deutsche Arbeiterpartei), abbreviated NSDAP, a racialist (belief that one race is superior to others), totalitarian (government having absolute and centralized control) political party in Germany between 1919 and 1945. It was known as the German Workers' Party (DAP) before the name was changed in 1920.
Nazism’s principal instrument of control was the unification, under Heinrich Himmler and his chief lieutenant, Reinhard Heydrich, of the SS (the uniformed police force of the Nazi Party) and all other police and security organizations. Opposition to the regime was destroyed either by outright terror or, more frequently, by the all-pervading fear of possible repression. Opponents of the regime were branded enemies of the state and of the people, and an elaborate web of informers—often members of the family or intimate friends—imposed utmost caution on all expressions and activities. Justice was no longer recognized as objective but was completely subordinated to the alleged needs and interests of the Volk. In addition to the now-debased methods of the normal judicial process, special detention camps were erected. In these camps the SS exercised supreme authority and introduced a system of sadistic brutality unrivaled in modern times.
The twin pairs of gas chambers were numbered II and III, and IV and V. The first opened on March 31, 1943, the last on April 4, 1943. The total area of the gas chambers was 2,255 square meters; the capacity of these crematoria was 4,420 people. Those selected to die were undressed in the undressing room and then pushed into the gas chambers. It took about 20 minutes for all the people to death. In II and III, the killings took place in underground rooms, and the corpses were carried to the five ovens by an electrically operated lift. Before cremation gold teeth and any other valuables, such as rings, were removed from the corpses. In IV and V the gas chambers and ovens were on the same level, but the ovens were so poorly built and the usage was so great that they repeatedly malfunctioned and had to be abandoned. The corpses were finally burned outside, in the open, as in 1943. Jewish sonderkommandos worked the crematoria under SS supervision.
That Mengele – they call him a doctor, but he was as much a doctor as I’m an army general. A complete fake of a man who I was too scared to look in the eye. I saw him day in, day out for months and was one of 152 Jews in his “care”. One of the experiments he carried out on me was to take blood from my arm and inject it in my rear end. I’ve no idea what that was trying to prove.
What of those immigrants who became citizens, or those beleaguered minorities to whom the United States granted the privileges of citizenship? Despite an avowed declaration of constitutional equality, citizenship was under its own separate-but-equal doctrine. Until 1924, Native Americans were considered “nationals” and not citizens. After the Spanish-American War of 1898, Puerto Ricans and Filipinos were legally classified as “non-citizen nationals.” Most infamously, the 1857 Dred Scott decision held that African Americans were not citizens, and even after the Civil War, black people were legally relegated to third-class status. The Nazis took interest in all of this; the second Nuremburg Law confined citizenship to that person who “is exclusively a national of German blood, or racially related blood.” Jews were denaturalized, rendered subjects. The U.S. precedent laid out how to create a hierarchy of citizens, nationals, and subjects. Tiered citizenship and the capricious revocations of civil rights were of great interest to Nazi intellectuals.
When three refugee physicists confided to Einstein that the Nazis might be developing a new weapon—an atomic bomb—he decided to act. Despite his previous appeals for governments to dispense with the weapons of war, Einstein wrote to President Franklin Roosevelt in 1939 alerting him to "a new phenomenon that would...lead to the construction of bombs" and suggested that the United States accelerate its atomic weapons research program. Scholars debate the effect of this letter. Einstein signed it in 1939 and the Manhattan Project, the U.S. effort to build the bomb, began in 1941.

After September 1939, with the beginning of the Second World War, concentration camps became places where millions of ordinary people were enslaved as part of the war effort, often starved, tortured and killed.[21] During the war, new Nazi concentration camps for "undesirables" spread throughout the continent. According to statistics by the German Ministry of Justice, about 1,200 camps and subcamps were run in countries occupied by Nazi Germany,[22] while the Jewish Virtual Library estimates that the number of Nazi camps was closer to 15,000 in all of occupied Europe[23][24] and that many of these camps were run for a limited amount of time before they were closed.[23] Camps were being created near the centers of dense populations, often focusing on areas with large communities of Jews, Polish intelligentsia, Communists or Romani. Since millions of Jews lived in pre-war Poland, most camps were located in the area of the General Government in occupied Poland, for logistical reasons. The location also allowed the Nazis to quickly remove the German Jews from within Germany proper.