Most likely many people would have still died. Much of the genocide was precipitated by (unintended) biological factors. Perhaps more of those civilizations w

Most likely many people would have still died. Much of the genocide was precipitated by (unintended) biological factors. Perhaps more of those civilizations would have survived, but they would have still be reverse-decimated (decivivimated?) by disease. If we cared enough to end war I would have hoped we would have ended slavery as well.