One of the 'recently' developed theories about human evolution is the POLYVAGAL Theory (PVT), developed by Dr. Stephen Porges. Poly, as you likely know means , and Vagus means wandering. The theory has amazing ideas that haven't yet been opposed by other theories, in my experience. Just Take a look at what the vagus nerves look like as one evolved system that regulates our autonomic (mostly automatic) nervous system:
Our Multiple Wandering Vagus Nerves (and why that matters)
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