Anyone who's ever gone camping knows that fire is prehistoric TV. You stare at it for hours until it gets boring and then you throw on another log, which is prehistoric changing the channel. And while you're doing your primitive chilling, you inevitably think about cavemen doing the same thing. Then you wonder: What did cavemen think about? I'll tell you. They thought about how shitty their lives were.
Walking with Cavemen basically said staring at fire is what made us smarter. Creativity was born in fire! And I can only speculate that once cavemen started building fires they started throwing all kinds of plants into it to see what burned the best. Sooner or later, Stoney the Caveman threw in some weeds that made his fire-staring sessions incredibly intense.
Then Stoney got sad. Because fire made him think more and thinking more made him more self-aware and being more self-aware made him realize that his entire life is hardship. And nothing is sadder than a sad caveman because he is the walking (sort of!) definition of limited resources. Cavemen are so fucked.
Here's some more things that just occurred to our early friend: