Mary McCarthy reflects on the nature of stupidity through the character of Eichmann, suggesting that his actions stem not from a lack of intelligence but from a deeper moral failing. She aligns her thoughts with Kant, asserting that true stupidity arises from a "wicked heart" rather than mere cognitive deficiency. This perspective indicates that insensitivity and a lack of understanding are active choices rather than accidental traits.

McCarthy highlights that this form of mental oblivion is aggravating because it signals a refusal to engage with moral and ethical responsibilities. Unlike individuals who are simply lacking in intelligence, those like Eichmann exhibit a troubling willfulness that makes their ignorance more disturbing and less forgivable, ultimately influencing how society perceives and reacts to their actions.