In his novel "Ada, or Ardor: A Family Chronicle," Vladimir Nabokov emphasizes the connection between stupidity and the influence of crowds. He suggests that a lack of independent thought leads to emptiness, particularly in those who conform to group behavior without questioning their ideas. This reflects his belief in the importance of individual intellect and the dangers of majority thinking.

Nabokov's quote implies that the crowd can dilute individual reasoning, often resulting in shallow or uninformed opinions. An "empty head" signifies a mind devoid of depth and critical thought, signaling that true wisdom is found in personal reflection rather than blind adherence to collective norms.