Nazi eugenics
According to an editorial by Arthur Caplan in "Science", bioethics questions including "stem cell research, end-of-life care, the conduct of clinical trials in poor nations, abortion, embryo research, animal experimentation, genetic testing, or human experimentation involving vulnerable populations" are often compared to Nazi eugenics and Nazi human experimentation. According to Caplan, the Nazi analogy has the potential to shut down debate and its capricious use is unethical. Similar arguments were made by Nat Hentoff in 1988, writing for "The Hastings Center Report".