S.L. Washburn: The Evolution of Human Behavior 

He was very close to how I think with one great exception: I see things though the eyes of a predator whereas he does not. I love Jane Goodall but chimps aren't the predators we are. If they were they wouldn't be around. I see people attack a black friday sale as though it were a deer. One thing he doesn't realize is that the skill required to trap a fox is totally different than the skill to trap a beaver which is totally different than the skill to trap a raccoon. We are obsessed with problem solving in order to eat every day. Imagine eating every day if on the other side of a mountain there exists no animals you have the skill to get? He does mention our need for "causes", so he is close. Almost everything we do or own is ammunition for solving a problem. This has been bred into us. Your car, shoes, house, sidewalk, the tires on your car, your garage, all are solutions to problems. Name one thing at Walmart that doesn't solve some problem? Of all the babies or children who died in floods, tornadoes, plagues, famines, etc. None are your direct ancestors. That would be like saying your Grandfather died at 8, which is impossible. So how could you be so lucky? Because they were obsessed with problem solving and now you are. Money was invented to solve all problems, which is why everyone seems to chase it so much.