Well... sure, but if you're really pushing the admixture hypothesis you'd necessarily need to assume that the species that lived in a more densely populated gro

Well... sure, but if you're really pushing the admixture hypothesis you'd necessarily need to assume that the species that lived in a more densely populated group was likely less individualistic. Add the Neanderthals' survival in sub-zero temps and you can easily claim that the Neanderthals weren't just "a little smarter" than the homo sapiens, they were likely doing 2 or 3 SDs on them, easily. Plus, them being acclimated to the cold would give them much better, not worse, eyesight, because they'd have to cross large distances and actually be able to make out things in the ice, and would also need good peripheral vision for protection from really bright light. "ruinous birth rate" doesn't really make sense... unless you compare the population of the neanderthals to that of the sapiens. By all accounts, the neanderthals lived in small groups, often not even over 30 individuals. They also likely had a very varied diet, or at least a very rich diet, because you can't be expected to be dumb and undernourished if you're eking out centuries in a cave because the weather outside is cold enough to freeze your bones. As for the last paragraph... agreed. Even the most skillful warriors can be overtaken by a huge wave. Nothing to fight.