LitCharts assigns a color and icon to each theme in The 5th Wave, which you can use to track the themes throughout the work.
Trust and Belief
Survival and Perseverance
Warfare and Dehumanization
Family
Summary
Analysis
Cassie, Ben, and Sammy go up some stairs Evan showed them. Ben is weak from loss of blood. Cassie thinks about how the flaw in Vosch’s plan is that if the aliens can’t kill all the humans at once, the survivors will be the most resilient people of all.
As the novel approaches the ending, the tone becomes more hopeful. While the 5th Wave is about humanity tearing each other apart, this passage shows an alternative outcome where the surviving humans become more resilient by helping one another.