Tade Thompson’s Rosewater begins with a familiar science-fiction situation: an alien presence has arrived on Earth, and human beings do not understand its purpose. The arrival brings no fleet, ambassador, or declaration of war. Wormwood settles in Nigeria inside an opaque biodome, and a city grows around it. Sick and injured people gather for healing. Government agencies collect information. Criminals seek opportunities, and religious movements form. Meanwhile, microscopic alien organisms enter human bodies and alter them from within.
Thompson presents invasion as a problem of access. Wormwood can enter tissue, communicate through minds, repair damaged bodies, preserve traces of the dead, and expose human beings to one another. People experience its presence intimately long before they understand its purpose. The alien reaches them through wounds, illnesses, memories, desires, and nervous systems.
Because Wormwood reaches people in this way, they cannot resist it as they would an army outside the body. Its cells already move through human flesh, and its network surrounds thought. People depend on its healing even as they fear it. By the time the trilogy reveals the scale of the alien project, occupation has become part of ordinary life.
The novels describe this process through biotechnology, fungal networks, psychic sensitivity, and extraterrestrial ecology. They also recall West African understandings of a world in which personhood does not end at the skin. In several distinct traditions, the living remain connected to ancestors, spirits, divinities, inherited obligations, and hostile presences. Thompson does not reproduce any one religious system under futuristic names. He constructs a fictional system in which alien contact resembles spirit possession, divination, haunting, initiation, and communal memory.
Kaaro, the first novel’s central narrator, stands where these structures meet. He enters the xenosphere, reads impressions left by other minds, encounters the dead, and interprets signs that remain obscure to most people. The Nigerian government employs him because his sensitivity has practical uses. His work belongs to intelligence gathering, interrogation, and psychic surveillance. It also recalls the work of a trained religious specialist who approaches an unseen domain, receives difficult information, and interprets it for people facing immediate problems.
Kaaro is not a babalawo in any literal religious sense. He has undergone no recognised Ifá training, holds no priestly office, and does not serve a community through established ritual obligations. The comparison concerns his function in the story. He is a compromised interpreter of an invisible field, recruited by state officials and forced to decide what responsibilities accompany his access.
Rosewater’s biological network
The xenosphere is one of the trilogy’s central inventions. Alien biological activity produces a shared mental environment that sensitive people can enter. Within it, they perceive information unavailable to ordinary human senses. Thoughts, memories, images, and emotional traces appear in forms that require interpretation. Distance behaves differently there, identity becomes unstable, and remnants of the dead persist beside the living.
Readers familiar with cyberpunk may initially recognise the xenosphere as a form of cyberspace. William Gibson’s Neuromancer established the influential image of a disembodied operator entering a data environment, crossing security barriers, and extracting information. Kaaro also enters an invisible network. He finds concealed material, penetrates guarded minds, and uses his ability for theft and surveillance. His work has the practical grime of hacking: clients, secrets, institutional employers, and the knowledge that another observer may be watching him.
Gibson’s cyberspace depends on machines, code, and corporate infrastructure. In Thompson’s trilogy, contact with living bodies and alien organisms produces the xenosphere. Kaaro cannot separate his mind cleanly from his flesh when he enters it. His access depends on physical changes caused by Wormwood, and his encounters within the network can affect his body.
Thompson also makes entry less orderly than logging into a computer system. No human intelligence has arranged the xenosphere for human use. Kaaro moves among impressions that may be partial, distorted, symbolic, or manipulated. He must interpret the material before he can use it.
A hacker commonly understands enough of a system’s rules to exploit them. Kaaro works inside a field whose rules remain uncertain because human beings did not build it. He can complete tasks there without understanding the system that makes those tasks possible. His employers often mistake access for mastery, which leaves them unprepared for Wormwood’s larger purpose.
The xenosphere also makes privacy unstable. Minds become reachable places, and memories leave traces that another person may use. A sensitive can discover knowledge that its owner has chosen to withhold. Thompson follows these possibilities through crime, interrogation, sex, state surveillance, and personal betrayal. Psychic sensitivity makes the observer vulnerable as well as the observed.
Entering the network never releases Kaaro from his body or his social position. His sensitivity places him under greater institutional control. Section 45, the government agency that employs him, provides a salary, protection, and access to restricted information. In exchange, its officers send him into other people’s minds and treat those minds as territory.
Across the trilogy, Thompson traces the xenosphere’s effects on labour, medicine, policing, intimacy, religion, and death. By following these consequences, he develops the network into an environment with its own politics. It never functions as a single speculative device added for convenient plot access.
For writers, this breadth offers a useful model of world-building. A new ability becomes convincing when its consequences extend beyond the character who possesses it. If minds can be entered, lovers need new boundaries, governments need new security practices, and criminals find new forms of theft. If the dead remain available through the same network, people confront new legal and ethical problems. Thompson builds his speculative world by following each altered relationship into daily life.
Kaaro as an interpreter
Kaaro first uses his sensitivity for personal gain. He enters minds, steals information, and learns that hidden knowledge can be converted into money or leverage. This history prevents the story from treating him as a morally pure seer. He understands psychic intrusion because he has enjoyed its rewards.
His later government employment gives the same ability official approval. Section 45 directs his access towards suspects and threats, though institutional authority cannot remove the violence of entering another person’s mind. It determines who authorises the intrusion and who benefits from it. Kaaro remains close enough to coercion to recognise the damage, even when he prefers to keep an emotional distance from his work.
He is observant, evasive, selfish in recognisable ways, and suspicious of noble explanations. He seldom regards his sensitivity as a sacred calling. He wants to survive, protect parts of his private life, and avoid becoming the instrument other people expect him to be. His reluctance allows Thompson to examine responsibility without turning Kaaro into a moral spokesman.
Kaaro still has to interpret what he encounters in the xenosphere. A memory may arrive without context. A dead consciousness may retain only fragments of its former personality. An alien intelligence may present an image that a human mind can receive while concealing the process behind it. Kaaro must judge what he has seen, how much he understands, and whether another intelligence has shaped the encounter.
His work resembles divination in this respect. In divinatory practice, a practitioner understands a sign through training, a body of knowledge, and the circumstances of the person seeking guidance. The practitioner recognises a pattern, relates it to established material, and decides how it should inform action. Information passes through a human relationship, so the interpreter’s discipline and obligations affect the result.
Kaaro has no stable discipline of this kind. His sensitivity develops before any trustworthy human institution has established an ethical structure for it. Section 45 trains him for operational use, with little concern for spiritual care. Criminal experience has taught him to exploit weakness, while fear encourages him to conceal what he knows. The alien origin of the xenosphere further complicates every judgment.
Human beings consequently gain access to a new domain before they understand its source or purpose. Scientists investigate Wormwood’s effects. Religious movements form around the alien. Government officials pursue control, and sick people travel to Rosewater because the biodome may heal them. Each group interprets Wormwood according to its knowledge, needs, and institutional pressures.
Kaaro occupies an unstable middle position. He knows more than most people and less than his employers assume. His sensitivity produces evidence that established institutions cannot obtain, yet it also exposes him to forces those institutions cannot measure. People grant him authority even though his knowledge remains incomplete.
Doctors, translators, intelligence analysts, priests, therapists, and scientists may also face demands for certainty when their evidence remains partial. Employers and clients often want a definite answer because they must make a decision. Thompson gives that pressure a physical form. Kaaro enters the place from which his evidence comes, and contact with that place changes him.
Personhood and permeability
Alien contact in the trilogy depends on human permeability. Skin does not provide a final border. Alien cells enter the body, while the xenosphere connects minds and exposes memories. Dead personalities persist in altered form. Wormwood heals damaged tissue through the same biological processes that advance its plans for humanity.
This model differs from accounts of the self centred on an independent individual contained within a private body. Several West African philosophical and religious traditions describe a person through bodily existence, spiritual components, destiny, family, community, ancestors, and divine powers. These traditions vary, and terms drawn from one language or ritual system cannot represent an entire region. Their differences need to remain visible. Across those differences, however, many accounts allow personhood to extend through relationships that exceed a sealed mind.
Yorùbá discussions of the person, for example, may distinguish the physical head from orí inú, the inner head associated with character and destiny. They may also involve ara, the body, and ẹ̀mí, commonly discussed as life-giving breath or spirit. Each term has a history of religious, philosophical, and linguistic interpretation. Together they show how people may understand bodily presence, inward disposition, destiny, and spiritual life as related dimensions of a person.
The Wormwood trilogy constructs its own material version of this complexity. Someone may remain alive while losing control over mental boundaries. Wormwood may repair a body as part of a project that threatens the human species. A dead person may persist as information without possessing the continuity that surviving relatives expect. The novels repeatedly test how much alteration a person can undergo while retaining an intelligible identity.
Kaaro experiences that problem directly. Other people’s memories and sensations enter his awareness. He can witness, trespass, and become overwhelmed. His sensitivity weakens any assumption that a thought belongs securely to the person thinking it. Biology no longer guarantees privacy, so characters must defend it through restraint, practice, or technology.
These conditions also change intimacy. Trust involves more than choosing what to disclose when a sensitive partner may reach withheld material. Even when no intrusion occurs, the possibility remains within the relationship. Affection gives Kaaro another reason to control his ability because greater access creates greater opportunities for betrayal.
Spirit possession provides one framework for understanding this permeability. Possession traditions vary greatly within West Africa and across the African diaspora. Communities may welcome a spirit, manage its presence through ritual, diagnose it as harmful, or understand it through several categories at once. A possessed person may speak in another voice, display unusual knowledge, lose ordinary control, or enter a recognised relationship with a spiritual being. Other people help determine the meaning of the event through ritual and interpretation.
Alien contact in Rosewater can also produce altered behaviour, knowledge, healing, and changes in identity. Thompson replaces the socially recognised spirit with an extraterrestrial organism whose purposes remain hidden. Human observers must decide whether contact represents a gift, an illness, an evolutionary development, a religious event, or an invasion.
No institution possesses a complete account. Scientists examine biological changes. State officials classify threats. Worshippers treat healing as evidence of sacred power. Sensitives experience the xenosphere as a crowded mental domain. Each group identifies part of what is happening while leaving other parts unexplained.
Readers using an Afromorphic approach can follow how Thompson places inherited ideas under speculative pressure. Remnants of the dead survive inside an alien biological network, changing the conditions of ancestral presence. Microscopic organisms provide a material mechanism for possession. A security agency employs the interpreter. Thompson develops these transformations through bodies, institutions, and personal consequences.
The dead inside the xenosphere
The dead give the xenosphere an emotional force that a communications network would lack. A database can preserve records of a person. Within the xenosphere, something associated with the dead may behave like a continuing presence. Survivors encounter voices, impressions, or personalities connected to people whose bodies have died.
The novels leave the nature of these presences uncertain. They may retain memories and recognisable traits without continuing exactly as the living person did. Wormwood’s biology could be storing consciousness, reconstructing personality, or using human remnants for its own purposes. Characters cannot easily distinguish among those possibilities from inside the alien system.
Even without certainty, characters respond to these presences with grief, loyalty, fear, or hope. Human relationships with the dead often develop across the same gap between experience and proof. Names, stories, obligations, dreams, rituals, and remembered conduct allow dead people to affect the actions of the living.
Many African religious traditions maintain active relationships between the living and particular categories of the dead. An ancestor is generally more than any deceased relative, and different communities establish their own conditions for ancestral status. Through ritual recognition, ancestors may retain moral authority, protect a family, issue warnings, or remain involved in communal life. Thompson does not reproduce these practices. He imagines a biological medium through which continued contact becomes materially possible.
That change creates an ethical problem. People usually organise ancestral relationships through kinship, responsibility, and ritual recognition. Wormwood preserves human remnants through an alien process. The xenosphere can therefore resemble an archive assembled without the consent of the people held inside it. Human beings gain contact with their dead while Wormwood controls the medium and the conditions of access.
Continued presence does not guarantee freedom. A stored personality may speak while remaining enclosed within someone else’s system. For survivors, contact can provide comfort. It can also deepen human dependence on the organism that owns the network.
Wormwood repeatedly provides things that people desire: healing, knowledge, connection, and some form of survival after bodily death. Every benefit also makes human beings easier to reach, study, alter, or replace. Thompson binds desire to vulnerability without declaring the desire foolish. The bereaved person who wants contact and the sick person who wants healing have urgent human reasons for accepting Wormwood’s gifts.
Thompson’s treatment of the dead also provides a standard for writers adapting ancestral material. An ancestor should affect the organisation of the fictional world. Thompson allows the continued dead to change memory, privacy, political control, and biological identity. Their presence creates practical questions. Who can hear them? Who believes what they say? Can another intelligence manipulate them? What authority should a surviving fragment possess? Who preserved it, and why?
Through these questions, Thompson gives the xenosphere consequences beyond the atmosphere of a haunting. The network changes how characters understand life and death.
Healing and alien occupation
Rosewater grows around Wormwood because the biodome periodically opens and releases an effect that heals many of the people gathered nearby. Injured and ill people come hoping for repair. Their arrival creates pilgrimage, trade, testimony, and public ritual around an entity beyond human control.
Healing makes Wormwood difficult to classify solely as an enemy. People who recover carry evidence of its benefit in their bodies. A government warning sounds different to someone whose cancer, injury, or chronic illness has been relieved. Gratitude can survive alongside suspicion.
Through the healing events, Thompson combines science fiction with patterns associated with religious practice. A powerful site attracts pilgrims who expect bodily transformation, and testimony from the healed supports the settlement that develops around repeated manifestations. Thompson gives these patterns a speculative biological basis while taking the worshippers’ experiences seriously. They form beliefs around an event that exceeds ordinary human power and transforms lives.
An extraterrestrial explanation does not make their religious response foolish. Scientists and government officials also work from partial knowledge. Worshippers may misunderstand the being they approach, while officials may misjudge its capabilities and scientists may describe a mechanism without knowing its purpose. No group possesses enough information to interpret Wormwood with confidence.
Healing also complicates consent. A sick person who approaches the dome accepts treatment without knowing its full biological cost. When no comparable cure exists, necessity narrows the choice. Alien cells repair the body while incorporating it into a larger ecological project. A single biological process produces restoration and assimilation.
Thompson uses this arrangement to modify familiar possession stories. An entering presence may disrupt a host’s control, yet Wormwood’s entry can save the host’s life. Refusing alien contact may mean refusing healing. Accepting help gives the healer deeper access to the body.
This contradiction has a limited parallel with colonial medicine. Colonial governments and missions sometimes connected medical treatment to surveillance, labour policy, conversion, or claims of administrative legitimacy. Effective treatment could operate within a wider system of domination. Wormwood is not a simple allegorical substitute for European empire. Its strategy creates a related political problem because a population receives genuine benefits from a power pursuing a destructive end.
Rosewater’s urban form reflects that dependency. The city exists because Wormwood exists. Markets, homes, jobs, police structures, religions, and personal histories accumulate around the biodome. Removing Wormwood would affect those who fear it as well as those who depend on it. Alien occupation has already produced a society.
Characters seeking liberation must therefore consider which parts of Rosewater could survive without alien power and which changes have become irreversible. Resistance may protect the species while costing individuals the source of their health or livelihood.
For readers, Wormwood’s healing prevents easy moral classification. An individual may experience real relief from a process that threatens humanity as a whole. Thompson preserves the truth of the healed body alongside the danger facing the species.
Kaaro and the babalawo comparison
Readers can better understand Kaaro’s position by describing him as a babalawo with a security clearance, provided they keep the differences explicit.
A babalawo is an initiated Ifá diviner, a title often translated as “father of secrets” or “father of mysteries.” Through training, memorisation, ritual practice, and interpretation, a babalawo works with the Ifá divinatory and literary corpus. The role involves obligations that extend far beyond unusual perception. Divination takes place within a religious tradition, a community of practitioners, and an ethical relationship with the person seeking guidance.
Kaaro lacks this institutional and ritual grounding. His sensitivity has a biological cause, his access comes through Wormwood, and his employer wants intelligence that can support state action. He receives secrets without a stable tradition that teaches him how to hold them. Without such guidance, he becomes isolated and makes serious mistakes.
The two roles are most comparable at the level of interpretation. The babalawo and Kaaro each approach information unavailable through ordinary perception. Each may provide knowledge that affects urgent decisions. In either case, the sign cannot explain itself. Someone must understand its pattern, context, and possible consequences.
Section 45 demands operational results from this process. Its officers want names, locations, threats, motives, and information they can act upon. Government decisions cannot always wait for certainty, so officials press Kaaro to translate ambiguous experiences into reports, interrogation results, or strategic advantages.
Security clearance gives him official permission to know secrets, but it provides no corresponding wisdom about their meaning. Kaaro can enter hidden spaces while misunderstanding the intelligence that created them. Section 45 has more resources than he does and shares his basic ignorance. Its procedures create an appearance of organised knowledge around an encounter that exceeds its categories.
The agency’s role is especially significant in a Nigerian setting. African states in speculative fiction are often missing, collapsed, or reduced to scenery while foreign organisations manage extraordinary events. Section 45 is secretive, coercive, capable, and divided. Its officers recognise that Wormwood presents a national emergency and an opportunity to acquire power.
Through Kaaro, state officials take control of a function associated with access to an unseen domain. Psychic interpretation becomes intelligence work, and difficult knowledge passes through bureaucratic channels. Officials can classify an experience and assign it a file number without resolving its nature. Administrative procedures control the circulation of evidence while leaving its meaning unsettled.
Writers adapting spiritual roles can learn from Thompson’s treatment of Kaaro. His position preserves a relation among a specialist, an unseen domain, dangerous knowledge, and people who need answers. Thompson changes the source of access, the surrounding institution, and the uses of interpretation. Those altered relationships generate the story’s political and ethical conflict.
Kaaro’s missing forms of support are central to this conflict. He has no recognised lineage of teachers, no interpretive corpus comparable to Ifá, and no shared ritual method for repairing harm caused by secret knowledge. His isolation stems from more than temperament. Human institutions have learned to exploit access before developing adequate responsibilities around it.
The limits of the comparison
Calling the xenosphere a spiritual realm or describing Kaaro as a diviner can clarify the trilogy, but careless use of either comparison would flatten living traditions. West African religions belong to real communities with distinct histories, practitioners, debates, and obligations. They cannot serve as a collection of colourful parallels for speculative fiction.
Wormwood is extraterrestrial, and alien biological activity produces the xenosphere. Sensitives enter it because contact has changed their bodies. These fictional facts make no claim about the nature of spirits, ancestors, or divinatory knowledge outside the novels.
The trilogy also draws from several genres. Alien-invasion fiction supplies the threat of species replacement. Cyberpunk contributes networked perception, information theft, and compromised employment. Espionage fiction provides structures of secrecy and state coercion. Horror appears through bodily intrusion and the uncertain status of the dead. Nigerian political and social life gives these elements a specific setting.
Readers reduce Afromorphism to a catalogue of sources if they search for one tradition behind every feature. Thompson draws upon relations found in African cosmological thought, including permeable personhood, continued contact with the dead, specialised access to hidden knowledge, and powerful forms of healing. He reconstructs these relations through alien biology, urban growth, and political surveillance.
Thompson never uses an African term as a label for generic magic. The xenosphere changes how bodies, families, lovers, criminals, officials, and the dead relate to one another. Although Thompson changes the cause of unseen presence, he retains its social consequences.
He also avoids romanticising permeability. Openness can provide knowledge and connection, while the same condition permits exploitation and loss of control. Accounts of personhood that extend through community or spiritual relationships still contain conflict. Such relationships produce obligations and dangers that a model of the isolated individual may struggle to describe.
Writers drawing on cosmological traditions can examine coercion within spiritual authority, unequal access to knowledge, failures of interpretation, and conflict between personal desire and communal obligation. Such critical attention differs from presenting a tradition as an exotic danger. Writers establish the distinction through their treatment of human choices, social relations, and lasting consequences.
Scientific descriptions also leave ethical and religious questions open. Cells, signals, and fungal networks can explain parts of a mechanism. They cannot decide what obligations follow from contact or how people should respond to a transformed relative. Spiritual comparisons have similar limits. They cannot erase Wormwood’s physical effects, Section 45’s programmes, or the material conditions of work, illness, recovery, and death.
Thompson ties metaphysical uncertainty to observable consequences. Characters may disagree about Wormwood’s nature, but they still have to live inside bodies and institutions changed by it.
Cosmology in the trilogy’s science fiction
In the Wormwood trilogy, Thompson uses cosmological ideas to structure a science-fiction world. He does not depend on references to gods, ritual objects, or folktales as signs of Africanness. He organises the story around relationships that make the sealed individual impossible.
Kaaro’s mind remains vulnerable to intrusion. The dead persist without becoming fully available to the living. Healing produces dependency, and an interpreter moves between ordinary life and an unseen field. Government officials attempt to control that movement. Wormwood enters humanity through connections that also promise knowledge and survival.
Thompson uses these elements to construct a distinctive invasion story. Wormwood does not need to occupy government buildings first. It changes the biological conditions under which human beings remain human. Its most effective forms of access arrive through experiences people actively desire: cure, contact, knowledge, and continuity after death.
Cyberpunk helps readers understand Kaaro’s ability to penetrate guarded spaces and extract information. Possession traditions draw attention to bodily exposure, compromised control, and the presence of the dead. Kaaro cannot remain a detached user because the network can inhabit and alter him. His encounters create relationships that exceed the categories of system, data, and operator.
Divination provides another useful comparison because Kaaro must interpret what he receives. He already possesses extraordinary access, but he lacks a sufficient framework for understanding his experiences and a trustworthy community for deciding how to use them. Section 45 supplies procedure, secrecy, and institutional authority. None of these resources teaches its officers or Kaaro how to develop an ethical relationship to knowledge.
Readers face a related difficulty. Thompson reveals Wormwood through characters whose information is partial. Later events alter the meaning of earlier explanations, forcing readers to test every interpretation against its consequences. Kaaro performs the same labour inside the story as he moves through a crowded field of impressions and gradually learns that each apparent gift belongs to a larger design.
For writers, Rosewater offers a model of transformative inheritance. Writers can preserve a cosmological relation while radically changing its vocabulary and setting. Thompson reimagines ancestral presence as consciousness preserved in an alien medium, divinatory access as psychic intelligence work, possession as cellular colonisation, and pilgrimage as a gathering around a biodome that heals the sick.
He then follows each change into ordinary and political life. Characters gain authority or become vulnerable. Institutions compete to control knowledge. Families and lovers face new boundaries. Sick people decide what they will accept in exchange for relief. By tracing these consequences, Thompson keeps the inherited relations recognisable within a future that has changed their material form.
Alien invasion and spirit possession become overlapping ways of examining entry, consent, interpretation, and another being’s capacity to act through a human body. Thompson uses that overlap to build a Nigerian science fiction in which cosmological relations form part of the world’s mechanics.
Kaaro lives within the resulting conflict. He is a thief, lover, civil servant, sensitive, witness, and reluctant interpreter. His security clearance determines which secrets state officials permit him to know. Their authorisation does not teach him how to understand those secrets, define his obligations to the people exposed by them, or secure what remains private once he enters the xenosphere.