The Nazi Party of Germany adopted and developed several pseudoscientific racial classifications as part of its ideology (Nazism) in order to justify the genocide of groups of people which it deemed racially inferior. The Nazis considered the putative "Aryan race" a superior "master race", and they considered Jews, mixed-race people, Slavs, Romani, Africans, and certain other ethnicities racially inferior "sub-humans", whose members were only suitable for slave labor and extermination. These beliefs stemmed from a mixture of historical race concepts, 19th-century anthropology, scientific racism, and anti-Semitism, especially racial anti-Semitism. The term "Aryan" generally originated during the discourses about the use of the term Volk.

The Nazi Party, officially the National Socialist German Workers' Party, was a far-right political party in Germany active between 1920 and 1945 that created and supported the ideology of Nazism. Its precursor, the German Workers' Party, existed from 1919 to 1920. The Nazi Party emerged from the extremist German nationalist, racist and populist Freikorps paramilitary culture, which fought against communist uprisings in post–World War I Germany. The party was created to draw workers away from communism and into völkisch nationalism. Initially, Nazi political strategy focused on anti–big business, anti-bourgeois, and anti-capitalist rhetoric; it was later downplayed to gain the support of business leaders. By the 1930s, the party's main focus shifted to antisemitic and anti-Marxist themes. The party had little popular support until the Great Depression, when worsening living standards and widespread unemployment drove Germans into political extremism.