Other primates don't cry like humans, so maybe by the time human crying became common, humans were already established as dominant predators not to be fucked wi

Other primates don't cry like humans, so maybe by the time human crying became common, humans were already established as dominant predators not to be fucked with. Human babies are never left alone so a crying baby probably signaled the presence of 5-10 adult humans or more. Not exactly an easy meal.