Evolving Psychiatry

Depression is often linked to adversity: why would it reliably appear in such conditions? Ed Hagen has spent over forty years wondering about this question, and is one of the world's foremost researchers on evolutionary approaches to depression. We discuss depression in this interview. Ed Hagen is a Pofessor of Evolutionary Anthropology at Washington State University. Professor Hagen began his academic career with a BA in mathematics from UC Berkeley and initially worked in an organic polymer lab before discovering his passion for anthropology. This led him to pursue a Ph.D. in anthropology at UC Santa Barbara, where he graduated in 1999. Following his doctoral studies, he joined Peter Hammerstein’s group at the Institute for Theoretical Biology at Humboldt University in Berlin. Since 2007, Dr. Hagen has been a faculty member at Washington State University, where he directs the Bioanthropology Lab. Dr. Hagen’s research explores evolutionary medicine, particularly focusing on non-infectious diseases—a field where traditional medicine has seen limited breakthroughs. His studies encompass various aspects of mental health, examining conditions like depression, suicide, and self-harm through the lens of evolutionary signaling strategies. He has also explored the complex dynamics of tobacco use and human interactions with plant secondary compounds, child growth and development (stemming from his research on postpartum depression), and more recently, evolutionary models of leadership and knowledge specialization. To connect with Dr. Hagen’s ongoing work, check out his blog at grasshoppermouse.github.io or follow him on Twitter at @ed_hagen and on Mastodon at @edhagen@fediscience.org.

In this engaging discussion, Adam Hunt, a postdoctoral researcher at the University of Cambridge, delves into the complexities of evolutionary narratives. He questions the validity of oversimplified stories in evolutionary psychology that connect modern traits to unseen historical events. Adam also examines the fascinating case of lactase tolerance, revealing how it demonstrates the intricate interplay between genetics and environment in shaping human experience. His insights challenge listeners to rethink their understanding of evolution and its impact on our emotions.

In the Amazon rainforest, how would mental illness manifest? What is life in non-industrialised societies like? Camila Scaff discusses social life, loneliness, and her journey investigating mental health and disorder amongst the Tsimane of the Bolivian Amazon. Dr. Camila Scaff earned her PhD in Cognitive Sciences from the École Normale Supérieure - Paris Diderot University (now Université Paris Cité). She holds split-time postdoctoral research fellowships with the Human Ecology Group at the University of Zurich’s Institute of Evolutionary Medicine and the Language Acquisition Across Cultures group at the École Normale Supérieure’s Laboratoire de Sciences Cognitives et Psycholinguistiques (LSCP) in Paris. Her research explores how socioecological environments shape human cognitive and linguistic variation.

Why does severe trauma lead to PTSD? This episode considers work on combat stress and PTSD symptoms in Turkana warriors of North West Kenya, and how it relates to evolutionary explanations of PTSD symptoms. Matt Zefferman is an Assistant Professor in the Department of Defense Analysis at the Naval Postgraduate School in Monterey, California. He uses mathematical models and ethnographic field research to understand human culture, cooperation, and conflict – especially in the contexts of political organization and war. He has also conducted ethnographic fieldwork with Turkana pastoralist warriors in northwest Kenya. They have a high degree of combat exposure – with about half of adult male mortality due to combat in cattle raids. Matt is interested in how Turkana organization for war has influenced their susceptibility to combat stress and moral injury. He has interviewed hundreds of warriors about their combat experiences, moral beliefs about warfare, combat stress symptoms, and moral injury. Before starting as an assistant professor at NPS Matt was a Donald R. Beall Defense Fellow in his department. Before that he was a postdoctoral research fellow at ASU’s Institute of Human Origins and a member of  the Adaptation, Behavior, Culture and Society research group in the School of Human Evolution and Social Change.  Before that, he was a postdoctoral researcher at the National Institute for Mathematical and Biological Synthesis and, before that, earned his PhD at the University of California, Davis in the Cultural Evolution and Human Behavioral Ecology Labs. Matt is also a US Air Force veteran with six years of service as a civil engineering officer with deployments to the UAE and Afghanistan.

Evolutionary explanations of depression could change how we perceive the condition, and how depressed people perceive themselves. In this episode, clinical psychologist Hans Schroder discusses his experiences and research in providing functional explanations of depression to patients. Hans Schroder is a Clinical Assistant Professor of Psychiatry at the University of Michigan (U-M) Medical School and a Psychology Faculty Associate at U-M. He received his Ph.D. in Clinical Psychology from Michigan State University in 2018 and completed his internship and two-year postdoctoral fellowship at McLean Hospital / Harvard Medical School in Massachusetts, followed by a 1-year postdoctoral fellowship at U-M in the Department of Psychiatry and the Center for Bioethics and Social Sciences in Medicine. As a licensed clinical psychologist, Dr. Schroder’s primary role in Psychiatry is providing psychotherapy and exposure-based therapies to individuals and groups with anxiety and depressive disorders in the Adult Anxiety Clinic. His earlier research examined error-related brain activity using electroencephalogram (EEG) and its relation to anxiety and depression. His current research interests include understanding beliefs and messages about mental health (e.g., the “chemical imbalance” narrative) and their impacts on treatment expectations, decision-making and well-being. The goal of this research is to better equip patients and providers with messages that optimize motivation for improving mental health. You can follow Adam Hunt on Twitter/X @RealAdamHunt

Justin Garson is Professor of Philosophy at Hunter College and The Graduate Center, City University of New York, and a contributor for PsychologyToday.com and Aeon. He writes on the philosophy of madness, evolution of the mind, and purpose in nature. In this episode we discuss scientific concepts of dysfunction, the role of the paradigms framing psychiatry, and the possible benefits of evolutionary thinking about mental 'disorders'. Justin has two recently published books you should check out: Madness: A Philosophical Exploration (Oxford University Press, 2022) and The Biological Mind: A Philosophical Introduction, 2nd ed. (Routledge, 2022). You can connect with Justin on Twitter @Justin_Garson You can connect with Adam on Twitter @RealAdamHunt

Joe Polimeni is a Canadian general psychiatrist and Associate Professor at the University of Manitoba who has conducted research in neuroscience, psychopharmacology and evolutionary psychiatry. His book, Shamans Among Us, outlines his hypothesis regarding the evolution of schizophrenia, which is the topic of this episode. You can purchase the book here: https://josephpolimeni.com/purchase.html You can follow Adam Hunt on Twitter/X @RealAdamHunt

Jerome Wakefield is a professor of social work in the Silver School of Social Work at New York University. Much of his work is in the history and philosophy of psychiatry. He is renowned in evolutionary psychiatry for his "harmful dysfunction" analysis of mental illness. We discuss our evolved human nature and how we can designate 'disorder' given our understanding of biological design, the pathologisation of normal sadness as depression, and the worth of evolutionary psychiatry to society. You can follow Adam Hunt on X/Twitter @RealAdamHunt

Tom Carpenter is a trainee psychiatrist in the West of Scotland. He is the trainee representative on the executive committee of the Evolutionary Psychiatry Special Interest Group of the Royal College of Psychiatrists. In this episode, we discuss Tom's intellectual history, the place of psychiatry in society and how we judge people, and how evolutionary thinking may affect psychiatry going forward. You can follow Adam Hunt on Twitter/X at @RealAdamHunt

Gurjot Brar is a trainee psychiatrist in Ireland. He runs the 'Evolution and Psychiatry' substack, a monthly collaborative 'journal' dedicated to discussing and exploring how evolutionary science can inform our understanding of psychiatry. In this episode we discuss how Gurjot got introduced to evolutionary psychiatry and the major points he finds exciting about the field. You can follow him on Twitter/X at @gurjotbrarmd You can follow Adam on Twitter/X at @RealAdamHunt