The Nazi regime of Germany during World War II is known for its atrocities, including the systematic persecution and extermination of millions of Jews and other minorities. However, the unethical medical experiments conducted by Nazi doctors on prisoners are less widely known, which were rooted in the ideology of Darwinism and racial purification. These experiments involved subjecting prisoners to brutal and often deadly procedures in the name of scientific advancement and the supposed improvement of the Aryan race. The ethical implications of these experiments and how they were justified by pseudoscientific theories of racial superiority continue to raise important questions about the role of science and medicine in society and the need for ethical guidelines and oversight in research. This paper explores the ethical dilemmas presented by the Nazi medical experiments, the relationship between Darwinism and racial purification, and the ongoing implications of these issues for contemporary society.