[joconde]

> Kids are generally stupider than adults.

Nope, by any measure, smart kids are way smarter than most adults I encounter. People who throw basic logic out the window because they want to believe that something is a certain way for emotional reasons often behave worse than kids.

Not all kids of course, but I think I've known more reasonable kids than reasonable adults overall.

> Stupid people are happier then smart people.

I know people who are much smarter than me and seem genuinely happy all the time.

I think it's more about how strong one's social mesh is, how happy people in one's entourage are, and one's own approach to life. If you're very smart and surrounded by smart people who you also like, you're happy.