Interesting. Did Neanderthals have souls? We know we interbred with them. The question is then whether earlier hominids also had souls. Was "ensoulment" a gradual phenomenon or did it arise spontaneously? If it was gradual does it mean at some point there was a "cross-over" period where we interbred with soulless hominids? Interbreeding becomes philosophically awkward if ensouled and non-ensouled beings could mate and produce offspring. I don't think it's clear at all even what has a soul and what does not.