In The Host, survival and resistance underpin the narrative and character development. The humans are trying to preserve their existence and identities while facing extinction due to souls who implant in and take over their bodies. The souls, meanwhile, require a host body to survive for an extended period of time. The novel’s premise thus pits the survival of souls against the survival of humans, yet the unfolding narrative suggests that this framing is overly simplistic, challenging the prioritization of survival at any cost. 

The novel’s exploration of survival unfolds both externally and internally, with Melanie’s and Wanderer’s battles for control over a single body paralleling the organized human resistance to the souls’ invasion. However, the novel is more concerned with the psychological dimensions of survival and resistance than the physical ones. This is evident, for example, in one of the ways that Melanie keeps her identity in the face of Wanderer’s implantation: She protects memories with particular emotional and practical significance. It takes months, for example, for Wanderer to find out about Jamie’s existence: “All this time, and I’d never even guessed at the boy’s existence—not because he didn’t matter to her, but because she protected him more fiercely than other secrets I’d unraveled” (38). Melanie’s shielding of her memories allows her to protect her loved ones from experiencing a similar fate, but it also underscores that survival entails more than mere continued existence: The implication is that without those memories—and without the people that populate them—Melanie would not find life worth living. 

The idea that a continued but impoverished existence may not really constitute “surviving” intersects with the novel’s exploration of the ethics of survival. Wanderer, for instance, is initially loyal to her species, but she begins to question the morality of the soul’s occupation of human bodies as she gets to know Melanie and the community in the caves. This internal conflict drives Wanderer to ally herself with Melanie, Jared, Ian, Jeb, and other humans in the cave community, risking her own life to protect them: “No wonder the success rate for resistant hosts was so low here on Earth. Once we learned to love our human host, what hope did we souls have? We could not exist at the expense of one we loved. Not a soul. A soul could not live that way” (510). Meyer further develops this idea in her accounts of the gruesome experiments the community undertakes in an effort to separate souls from their human hosts. While many feel the end—the survival of humanity—justifies the means, the novel itself is less sure, implying that some moral lines cannot be crossed even in self-preservation.

Instead, the novel hints that true, meaningful survival must arise out of cooperation—even sacrifice. Wanderer’s realization speaks to this, arguing that when souls come to know people and love them, they will willingly do what is best for the humans they love, even at their own expense. However, details throughout the novel suggest that the cost need not be so high; the blended human/soul family that Wanderer witnesses, for example, hints at a form of coexistence that the novel’s conclusion underscores. For both souls and humans, survival may hinge on setting aside their antagonism and sharing everything from the planet to their very bodies.