According to the article, humans developed these abilities for hunting. I'm pretty sure that having an empty stomach and starving children at home is a really good and inspiring reason.
And the difference between these early humans and animals might have been the much stronger social structure we have. As noted by other people in this thread, consider how pregnancies take 9 months, or the years it takes a newborn to reach maturity. So most probably, early humans that took care of their family better, were most apt to survive.
And the difference between these early humans and animals might have been the much stronger social structure we have. As noted by other people in this thread, consider how pregnancies take 9 months, or the years it takes a newborn to reach maturity. So most probably, early humans that took care of their family better, were most apt to survive.