Historian of Nazism Richard Weikart:
[T]he following evidence... demonstrate[s] overwhelmingly that Nazi
racial thinkers embraced human and racial evolution:
1) Hitler believed in human evolution.
2) The official Nazi school curriculum prominently featured biological evolution, including human evolution.
3) Nazi racial anthropologists, including SS anthropologists, uniformly endorsed human evolution and integrated evolution into their racial ideology.
4) Nazi periodicals, including those on racial ideology, embraced human evolution.
5) Nazi materials designed to inculcate the Nazi worldview among SS and military men promoted human evolution as an integral part of the Nazi worldview.
I... highlight the ways that Nazi racial thought was shaped by Darwinism (defined as biological evolution through the pro-cess of natural selection).
First, almost all Nazi racial theorists believed that humans had evolved from primates.
Second, they provided evolutionary explanations for the development of different human races, including the Nordic or Aryan race (these two terms were used synonymously). Specifically, they believed that the Nordic race had become superior because harsh climatic conditions in north-central Europe during the Ice Ages had sharpened the struggle for existence, causing the weak to perish and leaving only the most vigorous.
Third, they believed that the differential evolutionary development of the races provided scientific evidence for racial inequality.
Fourth, they held that the different and unequal human races were locked in an ineluctable
struggle for existence.
Fifth, they thought that the way for their own race to triumph in the struggle for existence was to procreate more prolifically than competing races and to gain more “living space” (Lebensraum) into which to expand.
Sixth, many argued that Darwinism promoted a collectivist ideal.
These six points—derived from the view that humans and human races evolved and are still evolving through the Darwinian mechanism of natural selection—profoundly impacted Nazi policy. They formed the backdrop for eugenics, killing the disabled, the quest for “living space,” and racial extermination.
Weikart's paper is a superb introduction to the mountain of evidence linking the Darwinian understanding of man to Nazi racial policies and anti-Semitism. His book is a great exploration of the obvious link (not yet available on Kindle, sadly, but a great read if you don't mind dead trees).
I also highly recommend Jerry Bergman's Hitler and the Nazi Darwinian Worldview (available on Kindle). Bergman's documentation is astonishingly detailed-- his chapter on Darwinism in the Nazi educational system is remarkable.
Nothing in Nazism makes sense except in the light of evolution. The debt owed to the evolutionary understanding of man by the Nazi understanding of man is obvious. Darwinian evolution is at the core of Nazi racial ideology. It is so obvious that Darwinists become unhinged at the mere mention of it. Which is ample reason to keep mentioning it.