The Theme of Denial vs. Action
InfernoThe novel contrasts the human tendency to deny global threats with the need for courageous action, personified by Zobrist's extreme measures.
increasing
Bearing strength in each event
decreasing
Global Denial

The Psychology of Denial
The Mechanism
Sienna explains that the human mind uses denial to cope with existential threats. People focus on trivialities to avoid facing overwhelming problems.
The Examples
Langdon recalls a study showing that students click away from depressing news to watch cat videos. This illustrates the widespread denial of the population crisis.
The Consequences
Zobrist's actions are a direct result of this denial. He felt that no one else would act, so he took matters into his own hands.
Courageous Action

The Moment of Decision
Sinskey's Leadership
Despite the failure, Sinskey takes decisive action to contain the crisis and coordinate a global response. She does not give in to despair.
Sienna's Choice
Sienna chooses to cooperate rather than run. She faces the consequences of her involvement, demonstrating courage.
Langdon's Role
Langdon, despite his amnesia, continues to pursue the truth. His actions show that even ordinary individuals can make a difference when they refuse to stay neutral.
Throughout the story
The climax