The book that I mentioned in this morning's session is "The Archeology of Mind" by Jak Panksepp and Lucy Biven. It's quite a tome but well worth looking at if you are interested in this subject matter.

https://uk.bookshop.org/p/books/the-archaeology-of-mind-neuroevolutionary-origins-of-human-emotions-jaak-panksepp/2594153?ean=9780393705317