" This is surely the main problem of the twentieth century: is it permissible merely to carry out orders and commit one's conscience to someone else's keeping? Can a man do without ideas of his own about good and evil, and merely derive them from the printed instructions and verbal orders of his superiors? Oaths! Those solemn pledges pronounced with a tremor in the voice and intended to defend people against the evildoers: see how easily they can be misdirected to the service of the evildoers and against the people! "

― Aleksandr Solzhenitsyn , The Gulag Archipelago, 1918-1956: An Experiment in Literary Investigation, Books V-VII