Many scholars think Nazism was a form of far-right politics.[1] Nazism is a form of fascism and uses biological racism and antisemitism. Much of the philosophy of this movement was based on an idea that the 'Aryan race', the term they used for what we today call Germanic people, was better than all other races, and had the greatest ability to survive. According to the racist and ableist ideas of Nazism, the Germanic peoples were the Herrenvolk (master race).[2] The 'inferior' races and people - the Jews, Roma people, Slavs, disabled and blacks - were classified as Untermenschen (sub-humans).[3]
Eventually, Birkenau held the majority of prisoners in the Auschwitz complex, including Jews, Poles, Germans, and Gypsies. Furthermore, it maintained the most degrading and inhumane conditions–inclusive of the complex’s gas chambers and crematoria. A third section, Auschwitz III, was constructed in nearby Monowitz, and consisted of a forced labor camp called Buna-Monowitz.
Mendelian inheritance, or Mendelism, was supported by the Nazis, as well as by mainstream eugenicists of the time. The Mendelian theory of inheritance declared that genetic traits and attributes were passed from one generation to another.[104] Eugenicists used Mendelian inheritance theory to demonstrate the transfer of biological illness and impairments from parents to children, including mental disability, whereas others also utilised Mendelian theory to demonstrate the inheritance of social traits, with racialists claiming a racial nature behind certain general traits such as inventiveness or criminal behaviour.[105]
After Nazi Germany unleashed World War II in September 1939, vast new territorial conquests and larger groups of potential prisoners led to the rapid expansion of the concentration camp system to the east. The war did not change the original function of the concentration camps as detention sites for the incarceration of political enemies. The climate of national emergency that the conflict granted to the Nazi leaders, however, permitted the SS to expand the functions of the camps.
In Germany, the belief that Jews were economically exploiting Germans became prominent due to the ascendancy of many wealthy Jews into prominent positions upon the unification of Germany in 1871.[85] From 1871 to the early 20th century, German Jews were overrepresented in Germany's upper and middle classes while they were underrepresented in Germany's lower classes, particularly in the fields of agricultural and industrial labour.[86] German Jewish financiers and bankers played a key role in fostering Germany's economic growth from 1871 to 1913 and they benefited enormously from this boom. In 1908, amongst the twenty-nine wealthiest German families with aggregate fortunes of up to 55 million marks at the time, five were Jewish and the Rothschilds were the second wealthiest German family.[87] The predominance of Jews in Germany's banking, commerce and industry sectors during this time period was very high, even though Jews were estimated to account for only 1% of the population of Germany.[85] The overrepresentation of Jews in these areas fueled resentment among non-Jewish Germans during periods of economic crisis.[86] The 1873 stock market crash and the ensuing depression resulted in a spate of attacks on alleged Jewish economic dominance in Germany and antisemitism increased.[86] During this time period, in the 1870s, German Völkisch nationalism began to adopt antisemitic and racist themes and it was also adopted by a number of radical right political movements.[88]
Early camps, usually without proper infrastructure, sprang up everywhere in Germany after Hitler became Chancellor in January 1933: rising "like mushrooms after the rain", Himmler recollected.[51] These early camps, also called "Wild camps" because some were set up with little supervision from higher authorities, were overseen by Nazi paramilitaries, by political-police forces, and sometimes by local police authorities. They utilized any lockable larger space, for example: engine rooms, brewery floors, storage facilities, cellars, etc.[52]
POW camps (Kriegsgefangenen-Mannschafts-Stammlager / Stalag) a.k.a. Main Camps for Enlisted Prisoners of War: concentration camps where enlisted prisoners-of-war were held after capture. The inmates were usually assigned soon to nearby labor camps, (Arbeitskommandos), i.e. the Work Details. POW officers had their own camps (Offizierslager' / Oflag). Stalags were for Army prisoners, but specialized camps (Marinelager / Marlag ("Navy camps") and Marineinterniertenlager / Milag ("Merchant Marine Internment Camps")) existed for the other services. Kriegsgefangenen-Mannschafts-Stammlager Luftwaffe / Stalag Luft ("Air Forces Camps") were the only camps that detained both officers and non-commissioned personnel together.
Most of the judicial system and legal codes of the Weimar Republic remained in place to deal with non-political crimes.[206] The courts issued and carried out far more death sentences than before the Nazis took power.[206] People who were convicted of three or more offences—even petty ones—could be deemed habitual offenders and jailed indefinitely.[207] People such as prostitutes and pickpockets were judged to be inherently criminal and a threat to the community. Thousands were arrested and confined indefinitely without trial.[208]
The Nazi Party Programme of 1920 guaranteed freedom for all religious denominations which were not hostile to the State and it also endorsed Positive Christianity in order to combat "the Jewish-materialist spirit".[207] Positive Christianity was a modified version of Christianity which emphasized racial purity and nationalism.[208] The Nazis were aided by theologians such as Ernst Bergmann. In his work Die 25 Thesen der Deutschreligion (Twenty-five Points of the German Religion), Bergmann held the view that the Old Testament of the Bible was inaccurate along with portions of the New Testament, claimed that Jesus was not a Jew but was instead of Aryan origin and he also claimed that Adolf Hitler was the new messiah.[208]
Nazi eugenics were Nazi Germany's racially-based social policies that placed the improvement of the race through eugenics at the center of their concerns and targeted those humans they identified as "life unworthy of life" (Lebensunwertes Leben), including but not limited to the criminal, degenerate, dissident, feeble-minded, homosexual, idle, insane, religious, and weak, for elimination from the chain of heredity. More than 400,000 people were sterilized against their will. Adolf Hitler (Führer and Chancellor of Germany unitl 1945) believed the nation had become weak, corrupted by the infusion of degenerate elements into its bloodstream which had to be removed as quickly as possible. He also believed that the strong and the racially pure had to be encouraged to have more children, and the weak and the racially impure had to be neutralized by one means or another.
Towards the war's end, in an effort to remove all traces of the crimes they had committed, the SS began to dismantle and raze the gas chambers, crematoria, and other buildings, as well as burning documents. Prisoners capable of moving were forced into death marches to other remaining areas of the Third Reich. Those who remained behind in the camp were liberated by Red Army soldiers on 27 January 1945. An estimated 1.3 million Jews, Poles, Soviet POWs, Roma, homosexuals, and Jehovah's Witnesses had been murdered within the camps by the time of liberation.

As early as February 1933, Hitler announced that rearmament must begin, albeit clandestinely at first, as to do so was in violation of the Versailles Treaty. On 17 May 1933, Hitler gave a speech before the Reichstag outlining his desire for world peace and accepted an offer from American President Franklin D. Roosevelt for military disarmament, provided the other nations of Europe did the same.[53] When the other European powers failed to accept this offer, Hitler pulled Germany out of the World Disarmament Conference and the League of Nations in October, claiming its disarmament clauses were unfair if they applied only to Germany.[54] In a referendum held in November, 95 percent of voters supported Germany's withdrawal.[55]
As a result of the Holocaust, the term "concentration camp" carries many of the connotations of "extermination camp" and is sometimes used synonymously. Because of these ominous connotations, the term "concentration camp", originally itself a euphemism, has been replaced by newer terms such as internment camp, resettlement camp, detention facility, etc., regardless of the actual circumstances of the camp, which can vary a great deal.