There is a thought experiment buried in a recent white paper by NHS psychiatrist Paul Collins.
He asks you to consider what gets excluded when a rating scale stands in for depression, when a diagnostic category stands in for a person, when a brain scan stands in for experience. The answer is: most of what matters. The category captures a shadow of the phenomenon. The phenomenon is elsewhere — in a body, in a set of relationships, in a neighbourhood, in a history that is continually unfolding.
Collins calls this the category error. Psychiatry has over-identified with the isolated brain as the primary site of mind and distress. It has produced a clinical system that is, as he writes, “often precise in method but impoverished in ontology.” The measurements are fine. The model of what is being measured is inadequate.
This critique has implications well beyond psychiatry. The same error runs through most contemporary psychedelic research — and through the integration frameworks that have grown up around it. If we are treating healing as something that happens inside the skull, we are misidentifying the territory.
Mind Doesn’t Live in the Brain
The enactive account of cognition — developed by Varela, Thompson, and Rosch, and central to the Psygaia Framework — holds that mind is not located inside the brain. It arises through the ongoing coupling between organism and environment. Perception is not the passive reception of a pre-given world. It is the active bringing-forth of a meaningful world through embodied, relational engagement. What the brain does is mediate that coupling. It is not its source.
Collins arrives at the same place from a clinical direction. He proposes what he calls the “person-in-field” — a model in which the brain is re-situated as a mediator within a living body-world system. Mental life emerges through dynamic relations between brain, body, environment, culture, history, and meaning. The shift he describes is from asking “what mechanism is malfunctioning?” to asking “what is flooding, blocked, damaged, or unable to move within this person’s field, and what conditions would allow life to move again?”
The mind is not a machine with broken parts. It is more like a river, moving through a landscape, shaped by banks, gradients, rainfall, obstructions, and the communities it passes through. A river can flood. It can stagnate. It can be over-engineered into rigidity. And it can recover when its wider ecology is restored. The clinical question becomes not “how do we fix the mechanism?” but “what kind of banks does this river need?”
This is not metaphor for its own sake. It redirects clinical attention toward the dynamics of flow, containment, and ecology that the mechanistic model systematically cannot see.
What This Means for the Psychedelic Paradigm
Psychedelic research has made progress by operating within psychiatric conventions. That is partly how it won legitimacy. But the conventions carry assumptions, and those assumptions shape what the research can find and what it cannot.
The dominant model treats the psychedelic as an agent that acts on the brain, producing therapeutic outcomes measurable in the individual. Preparation, session, integration — all three stages are structured around the individual as the unit of intervention. The question asked at each stage is some version of: what is happening inside this person?
The REBUS model — Carhart-Harris and Friston’s account of psychedelics as temporarily relaxing precision-weighted hierarchical predictions — has been enormously useful. It describes, in neurobiological terms, how habitual top-down priors loosen during psychedelic states, allowing bottom-up environmental signals greater influence over conscious experience. This is a very important finding, but it sits within a larger enactive account that REBUS does not itself provide. The loosening of predictive priors is also a loosening of the ego-centred organism-environment coupling through which a particular version of the world is ordinarily enacted. The world doesn’t just look different. The organism’s mode of being in relation to the world changes.
When that is the actual event — when what happens under psychedelics is a temporary reconfiguration of organism-environment coupling — then integration cannot be adequately understood as the individual processing and assimilating the experience. The question of integration becomes a question about what the experience is calling for in the context of the organism’s actual embeddedness in living systems. Whose relationships? With whom? On what terms?
The Field Is Not Background
Collins makes a point that cuts directly into current psychedelic integration practice. He observes that in the dominant psychiatric model, the rich contextual dimensions of a person’s life — relationship, place, community, meaning, economic situation, ecological embeddedness — become “contributory factors orbiting the illness like anxious moons.” They are acknowledged as context, not constituted as the primary site of either distress or healing.
The same move is made routinely in clinical psychedelic work. A person’s relational field, their connection to community, their relationship to the living world — these are treated as backdrop to the therapeutic work. The integration question remains interior: what did the experience mean to me? What patterns does it illuminate? What must I change in how I think or feel?
These are important questions, but they are not sufficient — and their insufficiency is not a matter of depth or sophistication. It is a matter of category. If mind arises through organism-environment coupling, and psychedelics temporarily reconfigure that coupling, then the integration of a psychedelic experience is necessarily an ecological event. It concerns the organism’s ongoing relations with its wider living systems. The relational field is not background. It is the site.
Researchers Celidwen and colleagues have called this the difference between kincentric and anthropocentric frameworks. In kincentric traditions — those underlying most Indigenous ceremonial practice with psychedelic medicines — the healing that takes place is not the restoration of an individual to prior function. It is the repair of the relationships on which all function depends. The individual is a node in a relational network, not a container to be healed from within.
A Different Clinical Question
What Collins proposes for psychiatry translates directly into a different approach to psychedelic integration.
The dominant integration question asks: what did this experience mean to me, and how do I incorporate that meaning into my life? This is what Psygaia’s earlier writing has called the clinical integration paradigm — structured around intrapsychic stabilisation, narrative coherence, and individualized transformation.
The ecological question asks: what does this experience demand in the context of my embeddedness in the larger community of life? What relationships have been disclosed as severed, neglected, or possible? What conditions in my field — relational, ecological, material — support or prevent the sustained reorganisation that the experience may have initiated?
These questions produce different integration practices. Instead of orienting solely inward toward the content of the experience, they orient outward toward the relational field the experience has made visible. They ask not just what was revealed, but what it is being revealed into — what kind of world, what kind of relationships, what kind of daily life the organism is returning to.
Collins names the post-psychedelic environment as clinically decisive in its own right. If a psychedelic state temporarily loosens habitual predictive structures, then what the organism is repeatedly oriented toward in the days and weeks following shapes which patterns reconsolidate. This is not incidental. It is the mechanism by which integration either takes root or fails to.
Building Living Banks
Collins’s bank metaphor is worth inheriting. A bank, in his account, is not a wall. A wall blocks, constrains, imprisons. A living bank contains and guides movement without stopping it. The task is not to suppress the river but to create conditions under which it can flow without flooding.
What constitutes a living bank in the context of ecological integration? Not just therapeutic technique. Sleep and physical movement, yes. But also: relationships that offer genuine co-regulation and recognition. Community structures that can hold the reorganisation without pathologising or spiritualising it. Time in the living world, encountered as a participant rather than a spectator. Practices that return the organism to its sensorimotor engagement with more-than-human environments. Economic conditions stable enough to permit attention.
The clinical model tends to treat these as background conditions, preconditions for the real work. The ecological model recognises them as the work. You cannot integrate a psychedelic experience of deep interdependence into a life organised around isolation, extraction, and chronic digital overstimulation — not because the insight was wrong, but because the field conditions prevent it from stabilising.
This is what Collins means when he writes that some of the most powerful clinical interventions available are ecological ones. Housing, community, meaningful work, access to the living world. These are not social work add-ons. They are the conditions within which any other intervention must be embedded if it is to hold.
Beyond the Brain
The emerging body of psychiatric work that Collins represents — variously called embodied, ecological, enactive, or relational psychiatry — is not a fringe position. It draws on Merleau-Ponty, Gibson, Varela, Fuchs, and a tradition of 4E cognitive science that has been building for three decades. It is also, increasingly, the theoretical home of the most rigorous accounts of psychedelic experience.
What it proposes, in the end, is not complicated. Mind arises through the living relation between brain, body, and world. Distress is a field phenomenon, not just a neural one. Healing is the restoration of conditions under which that living relation can flow. Psychedelics, under certain conditions, may temporarily reconfigure the organism’s mode of coupling with its environment in ways that make interdependence experientially salient — that make the relational structure of reality available to direct perception.
That is a remarkable thing. And it is wasted when the integration framework it is placed into treats the experience as something to be processed within an isolated individual, in a clinical room, measured against symptom reduction endpoints.
The brain was never the point. The brain was always in relationship. The work is to restore that relationship across all the scales at which it has been broken.
Sources
Belleau, L. (2025). The Psygaia Framework: An Ecological & Systems View of Psychedelics.
Carhart-Harris, R., & Friston, K. J. (2019). REBUS and the anarchic brain: Toward a unified model of the brain action of psychedelics. Pharmacological Reviews, 71(3), 316–344.
Celidwen, Y., Redvers, N., Githaiga, C., Calambás, J., Añaños, K., Chindoy, M. E., Vitale, R., Rojas, J. N., Mondragón, D., Rosalío, E., & Sacbajá, A. (2023). Ethical principles of traditional Indigenous medicine to guide western psychedelic research and practice. The Lancet Regional Health — Americas, 18, 100410.
Collins, P. (2025). Psychiatry After the Isolated Brain: From Brain-in-a-Box to Mind-in-a-Living-World — toward an embodied, relational, and ecological psychiatry. Spiral Lattice. https://mind-in-a-living-world-3ntzxiy.gamma.site
Fuchs, T. (2018). Ecology of the Brain: The Phenomenology and Biology of the Embodied Mind. Oxford University Press.
Varela, F. J., Thompson, E., & Rosch, E. (1991). The Embodied Mind: Cognitive Science and Human Experience. MIT Press.
Meling, D., & Scheidegger, M. (2023). Dynamic co-emergence: Enactive accounts of psychedelic experience. Phenomenology and the Cognitive Sciences.
