The Polyvagal Theory Debate: What It Says, What It Does Not, and What to Read

Something has been circulating in mental health and trauma circles recently. If you have heard about it, you may be wondering what it means for you, for your healing, or for the way you think about your own nervous system.

Here is what happened, and here is some context that I think is worth having.

In early 2026, a group of 39 researchers published a paper in a peer-reviewed journal arguing that polyvagal theory is scientifically flawed. The paper made its way quickly through clinical communities and then into broader online spaces. Headlines followed. And for people who have used this framework to finally make sense of their own experiences, that kind of news can feel disorienting. It deserves more than a headline.

Polyvagal theory was developed by Dr. Stephen Porges, a neuroscientist who has spent decades studying how the autonomic nervous system shapes our capacity for safety, connection, and healing. The theory introduced something that had been missing in trauma work: biological language for the states our bodies move through. Before this framework gained traction, people who froze in moments of stress, who shut down in the middle of difficult conversations, who could not feel safe even in safe environments, were often told they were overreacting. That they needed to think differently. That something was wrong with them.

Polyvagal theory offered a different explanation. Your nervous system learned, in the presence of real threat, how to protect you. Fight, flight, and shutdown are ancient, intelligent adaptations. They are not character flaws.

That reframe has been genuinely transformative for a lot of people. And it is not going anywhere.

Here is what the debate is actually about.

Dr. Porges published a formal, detailed rebuttal in the same peer-reviewed journal, in the same issue as the critique. His position is worth understanding clearly, because it is more specific than most summaries have conveyed.

The critics argue, among other things, that polyvagal theory is wrong about the evolutionary uniqueness of mammals and that its core measurement tool does not capture what the theory claims it captures. Porges' response documents, with specific citation to the primary literature, that several of these objections are directed at claims the theory never actually made. One example: critics pointed to social behaviors in reptiles as evidence against the theory, but polyvagal theory never claimed reptiles are incapable of social behavior. What it proposes is that mammals evolved a specific neurological pathway, connecting the heart to the face, voice, and ears, that makes a particular kind of safety-based social engagement possible. Those are different claims, and conflating them changes what is actually being debated.

Porges noted that specific clarifications to several attributed claims had been published in the peer-reviewed record in prior years. The critics, for their part, maintain that the foundational neuroanatomical and methodological concerns remain unresolved regardless of those clarifications. Both positions are documented in the published literature. Where you land on that depends on which primary sources you read and how you weigh them, which is precisely why reading both matters.

Porges addressed this directly in a message to the clinical and research community this month. He wrote that polyvagal theory does not ask for belief. It invites disciplined inquiry, careful reading, and ongoing empirical evaluation.

That is what science is supposed to do. It stays open. It tolerates scrutiny. It gets refined over time. A contested debate in a peer-reviewed journal is not evidence that a framework is broken. It is evidence that the framework is being taken seriously enough to argue about.

What this means practically.

For anyone who has found polyvagal theory helpful, who has used its language to understand their responses, to communicate with a therapist, or to extend a little more compassion toward their own nervous system, the core of that usefulness remains intact.

The clinical value of understanding safety, co-regulation, and the body's role in healing is grounded in decades of research that extends across neuroscience, attachment theory, and trauma psychology. It does not stand or fall on whether every detail of the underlying neurophysiology is eventually confirmed. As even the critics themselves acknowledged, the concepts at the heart of polyvagal-informed care, the importance of safety, the regulating power of connection, the adaptive nature of survival responses, those ideas have deep roots that no single scientific debate can uproot.

What I find most meaningful about how Porges has responded to this moment is its steadiness. He is not asking the clinical community to defend the work or to dismiss the critics. He is asking people to return to the primary sources, read carefully, and trust the scientific process to do what it does.

That is a posture worth modeling well beyond this particular debate.

Science advances through challenge. Frameworks evolve through scrutiny. And the people doing the most important work in any field are the ones who can hold complexity without losing their footing.

You do not need to resolve this debate to continue using what has helped you. You also do not need to take any framework, including this one, on faith. Read, ask questions, stay curious. That is exactly what Porges is inviting.

This is a conversation worth engaging directly rather than through secondhand summaries, including mine. Both perspectives are published in the same peer-reviewed journal, in the same issue, and both are accessible to anyone who wants to read them.

The critique: Grossman et al. (2026), Clinical Neuropsychiatry https://www.clinicalneuropsychiatry.org/download/why-the-polyvagal-theory-is-untenable-an-international-expert-evaluation-of-the-polyvagal-theory-and-commentary-upon-porges-s-w-2025-polyvagal-theory-current-status-clinical-applications-and/

The response: Porges (2026), Clinical Neuropsychiatry https://www.clinicalneuropsychiatry.org/download/when-a-critique-becomes-untenable-a-scholarly-response-to-grossman-et-al-s-evaluation-of-polyvagal-theory/

For additional context and citation-based documentation of the broader discussion, the Polyvagal Institute has compiled a resource at polyvagalinstitute.org/criticaldiscussionofpolyvagaltheory

Read both. Form your own view. That is what good science asks of all of us.

With you in the work.