Other minds
Neanderthals were more closely related to us than we had been taught by modern culture. They had language, fire, buried their dead, made ornaments and simple tools. I really enjoyed the book Kindred: Neanderthal Life, Love, Death, and Art, which lays out all the evidence we have about our country cousins, and what may have happened to them. It is well written and deep. I am reading about the other sentient beings our ancestors met, because AIs are not the first time we’ve had to deal with other intelligences. – KK