https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2352969/pdf/bmj00571-0043.pdf

"Not a slippery slope or sudden subversion: German medicine and National Socialism in 1933"

Hartmut M Hanauske-Abel

really good summary of how the medical professionals in nazi germany didnt all of a sudden become rogue executioners and willingly and knowingly did what they did. lays out the context for making sure it doesnt happen again and how to see the scientific/political/economic events that could cause it to happen.

like now.