Anthropology

Neanderthals. We have, however, a history of spreading deadly infectious diseases to remote "virgin" populations, whether intentionally or not. Native Americans for one; Amazon native tribes as another. Who is to say Neanderthals could not have conversely spread things to Homo sapiens... Quite possible and probable.

As to other primates, including chimps prone to violent or even homicidal/genocidal tendencies. I never claimed otherwise. I simply point out that Homo sapiens clearly have that capacity and have had the opportunity to express it far more and to a much more intense magnitude than other species in recorded history. To say as you did that Homo sapiens as a species when facing survival is NOT inclined toward homicide is simply not true. As with all traits in species, it does not imply that all individuals are so inclined. Nor, as with chimpanzees, does it mean that the same behaviors are not found in other species. Homo sapiens are just better at it.

But, I do agree--a combination of factors.