Why are people smart? More specifically, why are some people driven to be smart? Well, humans are social creatures, people want to be intelligent because others admire intelligence.
Looking to nature, we can ask a similar question. Why do peacocks spread their feathers? They do it to attract mates. But that begs the bigger question. Why do other peacocks admire a peacock that can make a big feathery display?
Tying this back to humanity, why do other humans admire a human who can always win at scrabble, or make a witty joke?
There is one thing that connects the tail of a peacock, and a game of chess, and that thing is waste. Male peacocks attract females by showing them that they are genetically successful enough to waste resources on bright plumage and elaborate dances. Humans do this too!
Humans waste money on expensive fashion to show other humans their success. In a similar way, many humans waste extreme mental effort on fruitless labors like art and debate to convince other humans that they are cultured.
The average human brain hogs up about twenty percent of the body’s daily energy. You may say that intelligence is practical, but Humans actually show more brain activity when socializing than when solving problems.
Basically, humans primarily use their brains to woo other humans. With this in mind, could it be possible that problem solving is a secondary function of the human brain? Tell me what you think.