system
Given the following post, respond as if you're commenting on Reddit:
human
Given that human history is rife with genocides, is it possible that our xenophobic tendencies caused homo sapien sapiens to be the only type of human left?
gpt
Entirely possible, but keep in mind that there is genetic evidence of H. Sapiens breeding with neanderthals and denisovans, who have passed genes on to living populations.  Homo Sapeins sapeins didn't burst out of Africa like a blitzkrieg, they interacted with other hominids in complex ways, one of which was probably war.

Fighting, and sustained, organized, *war* has certainly shaped our evolution, but one could just as easily say "Given that human history is rife with long distance trade and exchange of genes and ideas..."