Learning about the Polyvagal Theory by Dr. Stephen Porges has truly revolutionized the way I look at children, especially those children that are on the Autism spectrum. The Polyvagal Theory shows us how we have evolved over time to be more social, and also shows us why children or adults with Autism have problems with socialization. The vagus nerve is so much more than just 'rest/digest'...it is critical in social engagement.