In "Diary of a Madman," Lu Xun uses cannibalism as an allegory to illustrate how society's ethical and moral values can consume the individual into conformity. The villagers' belief in the tradition of consuming the oldest child's flesh pressures the main character into conforming, leading to his descent into madness. This is an example of groupthink, which is defined as a phenomenon where individuals in a group conform to the dominant opinion or idea, leading to irrational decision-making processes.
One example of groupthink in the story is the villagers' collective belief in the tradition of consuming the oldest child's flesh, which the main character initially resists. However, the villagers' insistence and mockery ultimately pressure him into conforming to their beliefs. Another example is the village's reaction to the main character's claims of cannibalism, which they collectively deny and ridicule, further emphasizing their conformity to tradition.
The main character's reaction and response to groupthink is his descent into madness, a consequence of his inability to conform to the villagers' traditions. He is unable to reconcile his own beliefs with those of the group, leading to a breakdown in his mental health.
The concept of groupthink is evident in Lu Xun's portrayal of the villagers' adherence to tradition and their collective denial of the reality of cannibalism. The consequences of this conformity are illustrated through the main character's descent into madness. This highlights the importance of critical thinking and individualism in society, as blindly conforming to group norms can have detrimental effects on the individual and society as a whole.