The American Society of Human Genes recently issued a written report apologizing for the past role in eugenics. There was a cultural environment of panic (“ competition suicide! ” ) and also a clamor for the experts to build a plan to deal with it.
Back then, the scientific consensus was most in for public policy based on high claims of ideal knowledge based on expert research.
It was popular within the Progressive Era and subsequent, and it heavily informed ALL OF US government policy. There’s no much better case study than the use of eugenics: the science, so called, associated with breeding a better race of human beings.