https://aeon.co/ideas/what-did-hannah-arendt-really-mean-by-the-banality-of-evil

he banality-of-evil thesis was a flashpoint for controversy. To Arendt’s critics, it seemed absolutely inexplicable that Eichmann could have played a key role in the Nazi genocide yet have no evil intentions. Gershom Scholem, a fellow philosopher (and theologian), wrote to Arendt in 1963 that her banality-of-evil thesis was merely a slogan that ‘does not impress me, certainly, as the product of profound analysis’. Mary McCarthy, a novelist and good friend of Arendt, voiced sheer incomprehension: ‘[I]t seems to me that what you are saying is that Eichmann lacks an inherent human quality: the capacity for thought, consciousness – conscience. But then isn’t he a monster simply?’