Travis, thank you so much for this excellent interview which I will be sharing widely! I've "followed" polyvagal theory for about ten years now. I first ran across the term "polyvagal tone" from a company that specialized in helping parents with autistic children. I've read (and reread) Dr. Porges books, and Deb Dana's books. Nevertheless I've never been able to articulate a clear and concise description of polyvagal theory, until now as Seth has boiled it down to: feelings of safety, or not, and how that affects both our body and cognitions. Brilliant!