I found the description of the Wells Notice to be interesting.
Source
Teri Buhl's column discussing this and the implications.
"When one knows it is possible to kill without risking either punishment or blame, one kills; or at least one surrounds those who kill with encouraging smiles. If one feels a little disgust, one keeps quiet about it, and before long one extinguishes it, for fear of seeming to lack manliness. One is swept up; it is an intoxication impossible to resist without a strength of soul I am obliged to consider exceptional."
Simone Weil, Paris, 1938