Prospectus

The mismatch between the cooperative, communal childcare characteristic of human evolution and the isolated nuclear-family parenting common in modern societies is one of the most parsimonious explanations of why postnatal depression is so common. Nikhil Chaudhary's group at the University of Cambridge has documented how Mbendjele BaYaka mothers receive continuous high-quality alloparental support, with direct implications for psychological wellbeing. Pilot focus groups using this evolutionary framing have shown that mothers and partners respond strongly to the message that struggling with solo parenting is not a personal failure but a natural result of unusual parenting situations, and encouraged both psychological improvements and behavioural changes.

A multi-site RCT comparing standard antenatal/postnatal materials to evolution-informed materials delivered to mothers, partners, and extended family during late pregnancy and the first six months postpartum. Materials would explain the universality and ancient roots of help-seeking and sharing childcare responsibilities, with practical prompts to build local support networks. Outcomes: Edinburgh Postnatal Depression Scale, social-support scales, partner and family help-with-care behaviours.

The chemical-imbalance framing of depression and the disease-like framing of anxiety have well-documented downstream effects on patient self-perception, including increased self-stigma and lower offset efficacy (the belief that the condition is changeable). Hans Schroder and colleagues' 2023 RCT (N = 877) showed that framing depression as a functional signal rather than a disease produced less self-stigma and more adaptive beliefs. The Hunt et al. (2026) trial confirms that the same effect holds for clinicians: a 30-minute evolutionary teaching session matched or exceeded the effect sizes of established anti-stigma interventions. Delivering these explanations at first contact — usually in primary care — may have an outsized impact on outcomes. First-line public resources currently lack any evolutionary framing: Mind UK, the US NIMH patient pages, and the Mayo Clinic frame common mental disorders almost entirely as biological dysfunction.

A multi-arm RCT in primary care across the UK and partner regions. GPs receive short training modules on evolutionary explanations of common presentations (anxiety, depression, ADHD, autism). Patients also receive a leaflet with a QR code linking to a 90-second video explanation. Primary outcomes: patient self-stigma, offset efficacy, treatment adherence, and symptom severity at three and twelve months.

An evolutionary lens often reframes neurodiversity not as simple disorders but as extreme expressions of trait spectra that confer trade-offs. Autism is consistently associated with markers of intellectual achievement at both the individual and family level; ADHD-associated traits map plausibly onto the cognitive demands of mobile, exploratory subsistence environments; and the genes associated with schizophrenia and bipolar disorder overlap with creativity and artistic professions. Existing neurodiversity training in workplaces, schools, and prisons rarely makes this scientific case. Doing so alters the perception of neurdiversity to the neurodivergent person and the people around them.

A two-track training programme for schools, workplaces, and prisons. Each location receives (i) staff training on evolution-informed explanations of common neurodivergent profiles, (ii) self-understanding sessions for neurodivergent individuals themselves. Pre/post measures of optimism, self-efficacy, peer attitudes, behavioural incidents, and academic/work outcomes. Long-term follow-up tracks education, employment, and recidivism.

Workplaces are the modern context that most closely mirrors the structure of an ancestral cooperative band: groups of unrelated adults working together on shared tasks with individual roles. Yet most corporate cultures are missing the elements that hold ancestral cooperation together — daily food sharing, ritual, music, transparency in decision-making, and meaningful daily feedback of success. The hypothesis is that re-introducing those elements, in modest, evidence-based forms, generates substantial gains in employee wellbeing, retention, and productivity.

Bespoke ancestral-pattern interventions in small or medium sized businesses. The programme reinstates shared food and regular non-transactional group rituals, introduces manager training on consensus-oriented decision-making and transparency, and explores modest flexible-working changes. Outcome measures: employee engagement, sick days, voluntary turnover, presenteeism, and a perceived-team-belonging scale. Pre-registered with company partners willing to share anonymised HR data. Cost-efficacy analysis.

Synchronous singing, communal eating, shared movement, and regular face-to-face contact were universal features of human community life for hundreds of thousands of years. Modern urban environments — and the decline of religious attendance — have stripped most of these rituals out of daily life, leaving us disconnected from our neighbours. Co-living and apartment living arrangements are growing rapidly, but typically lack any structured ritual or social element.

Partner with co-housing operators and residents' associations of suitable apartment blocks to introduce a structured weekly programme: shared meals, group singing or music, low-stakes physical activity, and check-in rituals. Half of sites are randomised to immediate intervention, half wait-listed. Pre/post measures across loneliness scales, wellbeing, sleep, depression, anxiety, and resident retention. Twelve- and twenty-four-month follow-up.

Evolutionary mismatch — the gap between the conditions human psychology evolved for and the conditions it now operates in — is a persistent consideration of evolutionary psychiatry. Sedentarism, fragmented sleep, lonely living arrangements, far-off abstract rewards, and steep social inequality plausibly act as a chronic background stressor that exacerbates many mental disorders. Certain therapies (e.g. psychotherapy, exercise) may work by rectifying these factors, but a stand-alone therapy that addresses mismatch precisely awaits development.

Develop and trial a manualised Mismatch Reduction Therapy (MRT) protocol. For example, target candidate domains: physical activity, community contact, romantic relationships, food sharing, sunlight and outdoor time, and meaningful daily achievement. Two delivery formats warrant testing: a multi-month course format emulating current courses in psychotherapy, and a residential retreat format emulating wellness retreats or rehab. Comparator: active control matched for therapist contact time. Primary outcome: depression or other problematic symptom severity, upon discharge and at 6 and 12 month follow up; secondary outcomes across social, occupational and relationship functioning.

Anxiety is one of the rare areas of mental health where genuinely effective treatment already exists. Exposure therapy for specific phobias achieves response rates of 80–90% — far above the 32–42% typical of other psychotherapies — and exposure and response prevention for OCD reaches up to 94% in intensive programmes. This efficacy makes sense evolutionarily: exposure engages the ancient fear-learning system that anxiety is built on, and teaches it through repeated safe experience that the stimulus is not dangerous. However, many anxiety sufferers never start exposure work, drop out early, or avoid it altogether because the experience of intentionally facing fear is itself fear-inducing. Randolph Nesse's smoke-detector principle — that anxiety is calibrated to over-fire because false alarms are cheaper than missed real threats — and the Hunt and Carpenter pilot RCT (2026) together suggest that evolutionary explanations may reduce self-stigma, raise offset efficacy, and increase patient willingness to engage with the discomfort that exposure-based therapies require.

An RCT testing whether evolution-informed psychoeducation, delivered before and during exposure-based treatment, improves uptake, adherence, and long-term symptom outcomes. Primary outcomes: treatment initiation, session completion, GAD-7/social-anxiety/panic measures at 3, 6, and 12 months, and a measure of willingness to engage with anxiety symptoms. Sub-studies cover generalised anxiety, social anxiety, phobias, and panic disorder.

Anorexia arises out of a particular collision between (a) a culture that prizes (particularly female) thinness and (b) personality traits that are themselves adaptive — most consistently conscientiousness and perfectionism. The same traits that make a young person diligent, organised, high-achieving and reliable can attach themselves to calorie restriction with devastating effects. Bulimia and other eating disorders show overlapping dynamics. The clinical implication is that the underlying drives are not the enemy: rechannelled, they are the engine of recovery and, often, of a life characterised by above-average success. Riadh Abed has emphasised the role of intensified intrasexual competition for status and attractiveness in modern environments as a key amplifier of this dynamic.

A pilot RCT integrating evolution-informed psychoeducation into existing therapy pathways for adolescent anorexia. Patients and families receive education on the role of conscientiousness and perfectionism as adaptive traits that have, in this person's case, been pulled into food restriction by a thinness-focussed culture. The protocol then guides patient and clinician in identifying alternative outlets for those drives — academic, creative, athletic, vocational — that the patient can move energy toward as recovery progresses. Primary outcomes: rate and stability of weight restoration, treatment engagement, recovery at 12 and 24 months. A parallel qualitative arm tracks how the framing changes patient self-understanding and family dynamics.

Substance and behavioural addictions share a common evolutionary logic. Human reward systems evolved to motivate fitness-relevant behaviour — eating, mating, status, skill development, social bonding — by generating positive emotions when those behaviours are successful. Hunt, Merola, Carpenter and Jaeggi (2024), in Neuroscience and Biobehavioural Reviews show how modern psychoactive substances and modern technologies hijack these systems by mimicking ancestrally fitness-relevant rewards in concentrated, novel, or unlimited form. Slot machines, video games, social media "likes", and pornography emulate ancestral cues for status, skill, social attention and sexual reward; opioids, stimulants and alcohol activate the same reward and pain-relief circuits. This framing changes how addiction should be conceived: and encourages therapies which help people re-orient their emotional compass away from the evolutionary mismatch.

Two complementary deliverables. (1) An enhanced psychological therapy for addiction that integrates evolutionary psychoeducation alongside standard pharmacotherapy and counselling. The therapy explains to patients and families why reward systems exist, what they are for, and why modern substances and behaviours hijack them — and uses that understanding to support engagement with restrictive or replacement behaviours that allow the person's emotional compass to recalibrate. (2) A CPD course for clinicians covering the evolutionary basis of addictive vulnerability and explicit measurement of de-stigmatisation outcomes — testing, for example, whether evolutionary explanations shift loci-of-control scores and reduce moral framings of addiction in clinicians, patients, and families. Both arms cover substance and behavioural addictions, with explicit application to healthy use of modern technologies.

Decades of work in computational and biological psychiatry have failed to identify reliable biomarkers, gene panels, or symptom clusters that predict who will respond to which depression treatment. Yet patients clearly differ. The evolutionary literature provides a novel theoretical framework for intepreting depressive episodes, which are heterogeneous because the depressive mood system and disgengaging from life could be a solution to a variety of ancestral problems. Markus Rantala and colleagues (2018) propose a 12-subtype model based on triggering factor (loneliness, infection, hierarchy conflict, romantic loss, post-partum, season, starvation, and more); Edward Hagen's earlier review likewise distinguishes several distinct adaptive pathways into depressed mood. These frameworks have remained explanatory rather than applied, but could be converted into a triage instrument that operationalise this insight (e.g. prescribing community activities to those suffering social rank loss).

Two complementary strategies for developing and implementing an improved triage framework. First, a passive arm: introduce evolution-informed intake questionnaires (relationship status, social support, workplace standing, recent loss, physical activity) to patients already entering a variety of depression treatments and test whether their answers predict treatment response. Second, a randomised controlled trial: GPs in half of participating practices use evolution-informed triage to direct patients toward the intervention class most likely to help — e.g. community activity, behavioural change, rumination-focussed therapy, or biological treatment. Successful triage logic could then be packaged as a self-administered app, pre-GP app, available at no cost, massively improving population depression outcomes.

PTSD has the clearest cross-cultural evidence from traditional-living societies of any psychiatric condition: its core symptoms (hyperarousal, intrusive memories, avoidance) seem like universal evolved responses to intense or lethal threat. Zefferman and Mathew's 2021 PNAS paper found that Turkana pastoralist warriors show very similar danger-response symptomatology to American combat veterans. However, they show less deprssive symptom. Traditional societies dealing with combat trauma rarely place the burden on the affected individual alone: family and community are involved through ritual, shared narrative and explicit acceptance. Anecdotal feedback from veterans also suggests that being told their reactions are an evolved response, rather than a personal pathology, materially changes self-perception and self-acceptance.

Develop and trial two evolution-informed modules to enhance existing trauma-focussed therapies. Two arms: (i) psychoeducation focussed, providing an evolutionary framing of PTSD responses to patient and key family members, to enhance understanding and acceptance, and encourage engagement with therapy; (ii) group ritual-based sessions modelled loosely on community trauma and combat-recovery practices observed in small-scale societies, validating experiences within the wider honme community. Primary outcomes: treatment engagement, dropout, PCL-5 score change, depresion rates, and family / partner satisfaction at 6 and 12 months.

Adolescent suicide and self-harm are predictable responses to situations of powerlessness. The hypothesis advanced by Kristen Syme and Edward Hagen frames suicidality and self-harm as costly signals of need that emerge when adolescents have little other power to resolve serious conflict with parents, partners, or other authority figures. Cross-cultural ethnographic data support this: the behaviour clusters around 'bargaining' situations and is widely read by communities as a credible signal of distress requiring change. The clinical implication is that the first line of defence should be structured mediation resolving the conflict of interests.

A randomised controlled trial comparing evolution-informed family mediation to treatment-as-usual. Clinicians receive short training in the evolutionary reasoning and most likely loci of conflict (relationships, academic pressure, autonomy, identity), and run mediation sessions with the explicit goal of identifying compromise positions and explaining the response to the controlling adult. Outcomes are tracked at three, twelve, and twenty-four months: repeat self-harm, hospital admission, school engagement, and family-relationship measures.

If mental disorders sit at the extreme end of trait distributions that have persisted under selection, then those distributions should also include benefits — otherwise the underlying genes would have been weeded out. Strengths have already been documented for autism (cognitive control and intellectual achievement) and schizophrenia and bipolar disorder (creativity). Many other conditions remain under-investigated, and almost no work tests for ancestrally relevant strengths in standardised, large-scale cohorts. Such evidence could be highly consequential in improving childhood — schools are where neurodivergent traits first become "problems", and where early identification and emphasis on strengths alongside difficulties could redirect a young person's trajectory.

A two-arm study programme. The first arm runs evolution-informed cognitive and behavioural assessments in clinical and family-member samples across diagnoses seeking related strengths (e.g. in families with ADHD, dyslexia, autism, schizotypy). The second arm uses existing genotyped biobank samples to test whether polygenic scores for these conditions also correlate with measures of relevant strengths in clinical and non-clinical populations. The combined design allows detection of strengths that are statistical, partial, and currently missed by clinical research.

Mental health diagnosis, treatment-response measurement, and drug approval all rest overwhelmingly on questionnaires — almost entirely self-report or clinician-administered, completed in the context of a brief clinical encounter. The shallowness this produces is well recognised as problematic: a person's daily behaviour, social network, and life circumstances are often completely overlooked, and a small set of subjective ratings taken at a single point in time become the sole target of analysis and treatment. Superior alternatives have been unclear, excessively complicated or untechnologically feasible. Smartphones and wearables now offer a new set of possibilities. Digital phenotyping has emerged as the a credible candidate for the next generation of psychiatric measurement, but a major methodological challenge remains in measurement decision. The possible data collection space is essentially unbounded: movement, technology use, social network analysis, media consumption, self-report measures, family and friend reports, sleep, diet; novel quantities and quality of these data sources are now accessible. The amount of data which can be collected for near zero cost is practically unbounded. Deciding which of these variables offer the most potential for valuable prediction can be informed by evolutionary theory.

An applied research programme building on existing evolution-informed scales — Cezar Giosan's Evolutionary Fitness Scale, the evolutionary mismatched lifestyle scale (Mind the Gap, 2024) — and adapting them around the new measurement possibilities opened up by smartphones and wearables. Early stages test which evolution-informed questions and which categories of digital-phenotyping data are most predictive for mental health problems. The long-term goal would be to identify the most predictive set of evolution-informed measures across the full range of mental health conditions — many of which are likely to operate cross-disorder rather than condition-specific — and eventually open up the possibility for re-defining disorder categories and treatment targets (e.g. distinguishing phasic from persistent anxiety).

Industrialised societies represent a small and unrepresentative slice of human evolutionary experience. If many modern mental disorders are partly products of evolutionary mismatch, then the mental-health profiles of subsistence and small-scale societies are critical comparison data. Camila Scaff and Adrian Jaeggi, at the Institute of Evolutionary Medicine in Zurich, have built the first culturally adapted, multi-stage psychiatric assessment instrument for the Tsimané of Bolivia, now published in Evolution, Medicine, and Public Health. A similar model could be scaled across multiple field sites allowing unprecedented and invaluable insight into the nature of human mental health problems.

Embed PhD students and postdoctoral researchers with five to ten existing field sites where anthropological access is already established (Hadza, Tsimané, Mbendjele BaYaka, Aka, Turkana, and others). Each researcher would (i) translate and adapt mental-health instruments into local idiom in collaboration with community members, (ii) collect quantitative prevalence data on traits and emotional states related to mental disorder and (iii) document local idioms of distress and ritual responses. The resulting cross-site dataset would be foundational evidence in evolutionary psychiatric epidemiology and stand as an invaluable resource for generations.