Racial policy of Nazi Germany in the context of "Nazi eugenics"

The European theatre of World War II was one of the two main theatres of combat during World War II, taking place from September 1939 to May 1945. The Allied powers (including the United Kingdom, the United States, the Soviet Union and France) fought the Axis powers (including Nazi Germany and the Kingdom of Italy) on both sides of the continent in the Western and Eastern fronts. There was also conflict in the Scandinavian, Mediterranean and Balkan regions. It was an intense conflict that led to at least 39 million deaths and a dramatic change in the balance of power in the continent.

During the 1930s, Adolf Hitler, the leader of Nazi Germany, expanded German territory by annexing all of Austria and the Sudetenland region of Czechoslovakia in 1938. This was motivated in part by Germany's racial policy that believed the country needed to expand for the pseudoscientific "Aryan race" to survive. They were aided by Italy, another fascist state which was led by Benito Mussolini. World War II started with Germany's invasion of Poland on 1 September 1939, and the Soviet Union, led by Joseph Stalin, joined the invasion later that month. The two nations then partitioned Poland between them.

Nazi Germany discriminated against and persecuted people on the basis of their race or ethnicity (actual or perceived), religious affiliation, political beliefs, sexual orientation, and, where applicable, mental or physical disabilities. Discrimination was institutionalized through legislation under the Nazi Party and perpetrated at an industrial scale, culminating in the Holocaust. Men, women, and children who were deemed mentally or physically unfit for society were subject to involuntary hospitalization, involuntary euthanasia, and forced sterilization.

The vast majority of the Nazi regime's victims were Jewish, Romani, or Slavic. Jews, along with some Romani populations, were deemed unfit for society on racial or ethnic grounds and largely confined to ghettos, then rounded up and deported to concentration or extermination camps. The beginning of World War II marked a colossal escalation in the Nazis' efforts to eliminate "inferior" communities across German-occupied Europe, with methods including: non-judicial incarceration, confiscation of property, forced labour (and extermination through hard labour), sexual slavery, human experimentation, malnourishment, and execution by death squads. For Jews, in particular, the Nazis' goal was total extermination—the genocide of the Jewish people, first in Europe and eventually in other parts of the world. This was presented by Adolf Hitler as the "Final Solution" to the Jewish question.

Aryanism is an ideology of racial supremacy which views the supposed Aryan race as a distinct and superior racial group which is entitled to rule the rest of humanity. Initially promoted by racial theorists such as Arthur de Gobineau and Houston Stewart Chamberlain, Aryanism reached its peak of influence in Nazi Germany. In the 1930s and 40s, the regime applied the ideology with full force, sparking World War II with the 1939 invasion of Poland in pursuit of Lebensraum, or living space, for the Aryan people. The racial policies which were implemented by the Nazis during the 1930s came to a head during their conquest of Europe and the Soviet Union, culminating in the industrial mass murder of six million Jews and eleven million other victims in what is now known as the Holocaust.

The German Nazi Party adopted and developed several racial hierarchical categorizations as an important part of its racist ideology (Nazism) in order to justify enslavement, extermination, ethnic persecution and other atrocities against ethnicities which it deemed genetically or culturally inferior. The Aryan race is a pseudoscientific concept that emerged in the late-19th century to describe people who descend from the Proto-Indo-Europeans as a racial grouping and it was accepted by Nazi thinkers. The Nazis considered the putative "Aryan race" a superior "master race" with Germanic peoples as representative of the Nordic race being the best branch, and they considered Jews, mixed-race people, Slavs, Romani, black people, and certain other ethnicities racially inferior subhumans, whose members were only suitable for slave labor and extermination. In these ethnicities, Jews were considered the most inferior. However, the Nazis considered Germanic peoples such as Germans to be significantly mixed between different races, with the East Baltic race being considered inferior by the Nazis, and that their citizens needed to be completely Nordicized after the war. The Nazis also considered some non-Germanic groups such as Sorbs, Northern Italians, and Greeks to be of Germanic and Nordic origin. Some non-Aryan ethnic groups such as the Japanese were considered to be partly superior, while some Indo-Europeans such as Slavs, Romani, and Indo-Aryans were considered inferior.

These beliefs stemmed from a mixture of historical race concepts, 19th-century and early 20th century anthropology, 19th-century and early 20th-century biology, racial biology, white supremacism, notions of Aryan racial superiority, Nordicism, social Darwinism, German nationalism, and antisemitism with the selection of the most extreme parts. They also originated from German military alliance needs. The term Aryan generally originated during the discourses about the use of the term Volk (the people constitute a lineage group whose members share a territory, a language, and a culture). Unlike the German armed forces (Wehrmacht) only used for military conflicts, the Schutzstaffel (SS) was a paramilitary organization directly controlled by the Nazis with absolute compliance with Nazi racial ideology and policies.

Untermensch (German pronunciation: [ˈʔʊntɐˌmɛnʃ] ; plural: Untermenschen) is a German language word literally meaning 'underman', 'sub-man', or 'subhuman', which was extensively used by Germany's Nazi Party to refer to their opponents and non-Aryan people they deemed as inferior. It was mainly used against "the masses from the East", that is Jews, Roma, and Slavs (mainly ethnic Poles, Belarusians, Czechs, Ukrainians, Russians and Serbs).

The term was also applied to "Mischling" (persons of mixed "Aryan" and non-Aryan ancestry) and black people. Jewish, Slavic, and Romani people, along with the physically and mentally disabled, as well as homosexuals and political dissidents, and, on rare instances, POWs from Western Allied armies, were considered Untermenschen who were to be exterminated in the Holocaust. According to the Generalplan Ost, the Slavic population of East-Central Europe was to be reduced in part through mass murder in the Holocaust for Lebensraum, with a significant amount expelled further east to Siberia and used as forced labour in the Reich. These concepts were an important part of the Nazi racial policy.