On the mystery of the disappearance of the Neanderthals.

I don't think that they were all butchered
by homines 'sapientes' (and/or eaten),
but simply 'absorbed' (under pressure of rape, etc.)
by the craftier species - thus, perhaps, providing
an anti-ambitious, anti-competitive, unobsessive
(opt-out/dissident) gene, which, unfortunately,
is far too recessive.