From its rise to power in 1933, the Nazi regime built a series of incarceration sites to imprison and eliminate so-called "enemies of the state." Most prisoners in the early concentration camps were German Communists, Socialists, Social Democrats, Roma (Gypsies), Jehovah's Witnesses, homosexuals, and persons accused of "asocial" or socially deviant behavior. Some of these facilities were called “concentration camps” because those imprisoned there were physically “concentrated” in one location.
Hitler told a party leader in 1934: "The economic system of our day is the creation of the Jews".[262] Hitler said to Benito Mussolini that capitalism had "run its course".[262] Hitler also said that the business bourgeoisie "know nothing except their profit. 'Fatherland' is only a word for them."[263] Hitler was personally disgusted with the ruling bourgeois elites of Germany during the period of the Weimar Republic, who he referred to as "cowardly shits".[264]
In addition to the Nazi Party proper, several paramilitary groups existed which "supported" Nazi aims. All members of these paramilitary organisations were required to become regular Nazi Party members first and could then enlist in the group of their choice. An exception was the Waffen-SS, considered the military arm of the SS and Nazi Party, which during the Second World War allowed members to enlist without joining the Nazi Party. Foreign volunteers of the Waffen-SS were also not required to be members of the Nazi Party, although many joined local nationalist groups from their own countries with the same aims. Police officers, including members of the Gestapo, frequently held SS rank for administrative reasons (known as "rank parity") and were likewise not required to be members of the Nazi Party.
In September 1933, an important policy document known as the Prussian Memorandum began circulating among lawmakers and jurists of the Third Reich. The Nazi regime was still in its infancy; Hitler had been named chancellor just nine months prior, the result of a power-sharing arrangement with nationalist conservatives who thought they could control the mercurial Austrian. Following the Reichstag Fire in February of that year, Hitler had assumed emergency powers and within weeks usurped the authority of the parliament. By that critical autumn, the Third Reich had begun Nazifying the German legal code. The Prussian Memorandum that passed between Nazi legal hands was an early blueprint for the 1935 Nuremberg Laws, which stripped Jews of their citizenship and criminalized sexual relations between Germans and those thought to have impure blood. It was the foundational text of Nazi legal thinking. Incredibly, the Prussian Memorandum expressly cited the gold standard of racist lawmaking at the time: the United States of America.

The commander of Auschwitz-Birkenau, Rudolf Höss, stated in his autobiography that in 1941 (no exact date is given) he was summoned to Berlin, where Himmler informed him that Hitler had issued an order to solve the “Jewish Question” for good, and that the order was to be implemented by the SS. “The existing extermination places in the east are unsuited to a large scale, long-term action. I have designated Auschwitz for this purpose,” Himmler said.
Returning to Auschwitz is going to be a cold, painful and tearful experience. It is a shadow that has always been with me and I’m hoping that by facing it for one last time at the age of 84 I will be able to live my life more peacefully, but I am extremely anxious. I lost my husband just days ago and I’m hoping I’ll finally be able to release my emotions when I’m there, as I’ve never really been able to cry much about anything. I’m comforted by the thought that there will be strength in numbers and that I’ll be there with perhaps 100 or so other survivors, which makes it easier. I would not go on my own. I appear to be a strong person, but inside I’m really quite fragile.
In the Soviet Union by 1922 there were 23 concentration camps for the incarceration of persons accused of political offenses as well as criminal offenses. Many corrective labour camps were established in northern Russia and Siberia, especially during the First Five-Year Plan, 1928–32, when millions of rich peasants were driven from their farms under the collectivization program. The Stalinist purges of 1936–38 brought additional millions into the camps—said to be essentially institutions of slavery.

One day the Hungarian gendarmes came to our house and ransacked it. In 1944, the Nazis ordered all Jews living outside Budapest to be rounded up and placed in ghettoes. Then it was our turn and that was the day our misery truly began. In the spring of 1944 we were part of a contingent of 7,500 Jews who were corralled into a makeshift ghetto in the Bungur forest. We had to wear the yellow stars of David. That was the day when almost one-and-a-half centuries of Jewish life in Dej came to an end.

The term "Nazi" was in use before the rise of the NSDAP as a colloquial and derogatory word for a backwards farmer or peasant, characterizing an awkward and clumsy person. In this sense, the word Nazi was a hypocorism of the German male name Ignatz (itself a variation of the name Ignatius) – Ignatz being a common name at the time in Bavaria, the area from which the NSDAP emerged.[6][7]

Auschwitz became a significant source of slave labor locally and functioned as an international clearing house. Of 2.5 million people who were deported to Auschwitz, 405,000 were given prisoner status and serial numbers. Of these, approximately 50 percent were Jews and 50 percent were Poles and other nationalities. Of those who received numbers, 65,000 survived. It is estimated that about 200,000 people passed through the Auschwitz camps and survived.

The trial of Adolf Eichmann in 1961 and the broadcast of the television miniseries Holocaust in 1979 brought the process of Vergangenheitsbewältigung (coping with the past) to the forefront for many Germans.[492][496] Once study of Nazi Germany was introduced into the school curriculum starting in the 1970s, people began researching the experiences of their family members. Study of the era and a willingness to critically examine its mistakes has led to the development of a strong democracy in Germany, but with lingering undercurrents of antisemitism and neo-Nazi thought.[496]
At the end of the war, Europe had more than 40 million refugees,[156] its economy had collapsed, and 70 percent of its industrial infrastructure was destroyed.[157] Between twelve and fourteen million ethnic Germans fled or were expelled from central, eastern, and southeastern Europe to Germany.[158] The West German government estimated a death toll of 2.2 million civilians due to the flight and expulsion of Germans and through forced labour in the Soviet Union.[159] This figure remained unchallenged until the 1990s, when some historians put the death toll at 500,000–600,000 confirmed deaths.[160][161][162] In 2006, the German government reaffirmed its position that 2.0–2.5 million deaths occurred.[f]
Since the prisoners were now needed for their labour, living conditions improved for a short time. From the end of 1943 onwards, inmates were also deployed in the construction of underground factories, for example those in Melk, Ebensee and St. Georgen an der Gusen. The murderous working conditions that prevailed at these sites soon led to a dramatic rise in the number of victims.

Auschwitz was probably chosen to play a central role in the “final solution” because it was located at a railway junction with 44 parallel tracks—rail lines that were used to transport Jews from throughout Europe to their death. Heinrich Himmler, chief of the SS, the Nazi paramilitary corps, ordered the establishment of the first camp, the prison camp, on April 27, 1940, and the first transport of Polish political prisoners arrived on June 14. This small camp, Auschwitz I, was reserved throughout its history for political prisoners, mainly Poles and Germans.

A second roll call took place at seven in the evening after the long day's work.[118] Prisoners might be hanged or flogged in the course of it. If a prisoner was missing, the others had to remain standing until he or she was found or the reason for the absence discovered, even if it took hours. On 6 July 1940, roll call lasted 19 or 20 hours because of the escape of a Polish prisoner, Tadeusz Wiejowski; following another escape in 1941, a group of prisoners was sent to block 11 to be starved to death.[119] After roll call, prisoners were allowed to retire to their blocks for the night and receive their bread rations and water. Curfew was at nine o'clock. Inmates slept in long rows of brick or wooden bunks, lying in and on their clothes and shoes to prevent them from being stolen.[120] The wooden bunks had blankets and paper mattresses filled with wood shavings; in the brick barracks, inmates lay on straw.[121] According to Nyiszli:
The first camp in Germany, Dachau, was founded in March 1933.[13] The press announcement said that "the first concentration camp is to be opened in Dachau with an accommodation for 5,000 people. All Communists and – where necessary – Reichsbanner and Social Democratic functionaries who endanger state security are to be concentrated there, as in the long run it is not possible to keep individual functionaries in the state prisons without overburdening these prisons."[13] Dachau was the first regular concentration camp established by the German coalition government of National Socialist Workers' Party (Nazi Party) and the Nationalist People's Party (dissolved on 6 July 1933). Heinrich Himmler, then Chief of Police of Munich, officially described the camp as "the first concentration camp for political prisoners."[13]