Br J Psychiatry
Framing anxiety as evolution, not genetics, may reduce stigma
Clinical Takeaway: Discussing anxiety as an adaptive survival mechanism that has become overly sensitized, rather than as a genetic condition, may reduce stigma, improve recovery optimism, and increase patient willingness to seek help.
How clinicians explain anxiety to patients shapes more than their understanding. It influences stigma, therapeutic relationships, and willingness to seek care. Biological and genetic explanations of mental illness have been shown to reduce blame but increase fatalism and reduce clinician empathy. This study tested whether an evolutionary framing of anxiety could offer a different biological explanation without those drawbacks.
In a cluster-randomized trial, 171 practicing mental health clinicians across the UK and Ireland were assigned to a 30-minute educational session presenting either an evolutionary or genetic explanation of anxiety. Clinicians who received the evolutionary framing were five times more likely to rate it as useful for patients and three times more likely to rate it as useful for their own practice.
They also showed higher optimism about patient recovery, greater belief that patients would be willing to share a diagnosis, and stronger expectation that the public would seek psychiatric help if evolutionary explanations were widely known.
Importantly, the differences were not driven entirely by the evolutionary framing improving attitudes. Genetic education actively worsened several measures including expected efficacy of psychosocial interventions and belief that individuals can influence their own anxiety. This suggests that genetic framing may reinforce a sense of biological fixedness that undermines therapeutic hope.
The evolutionary framework presented in the trial draws on the "Smoke Detector Principle,” which characterizes anxiety as a defensive mechanism biased toward false alarms because the cost of overreacting to a threat is lower than missing a real one. Under this model, anxiety symptoms are not evidence of a broken brain but an overstimulated survival response, a framing the authors argue is both scientifically grounded and therapeutically empowering.
The trial was conducted across 17 NHS trusts and two Irish healthcare organizations between 2023 and 2024. The majority of participants were psychiatrists at various training grades.
"Understanding anxiety as a deeply rooted survival function that has overshot the mark helps patients see their symptoms as exaggerated versions of a positive mechanism, and not evidence of a broken or abnormal brain," said Adam Hunt, PhD, researcher in evolutionary studies at the University of Cambridge's Department of Archaeology.
Source: Hunt AD, et al. Br J Psychiatry. 2026 May 7. Clinicians' attitudes to evolutionary versus genetic explanations for anxiety: cluster randomised study of stigmatisation