Survival of the...

Huddled at the foot of the escarpment, the mind of the first human ever to develop sapient thought was overflowing with questions. Where does the sun come from? Will I die? If I do, where will I go? Why do I feel hunger? What is wind? Why does it do that when I look at her?

Unfortunately, this inauspicious question was the last that he would ask. Not for any lack of desire for knowledge, however, but because the second human ever to develop sapient thought was crouched nearby, and reasoning that if he crept up behind him and smashed his skull with a rock he could have that half-eaten antelope that he was hoarding.