Way to make me feel like I've lived a wasted life!
I 've always said "Ignorance is easily cured, Stupidity is a lifelong disability"
Education has very little to do with it. Just think of all the less schooled people you know of , who can have a good conversation, on multiple topics, or know more than you on some topics. Also consider the mentally handicapped who live happy productive lives, Then think on the well schooled people who open their mouths, and out pops Stupid.Case in point ...the American Tea Party.
Where does "Stupid" come from? I think much of it comes from laziness. Take the Dumb Blond who finds it easier to be stupid and let her companion feel strong and smart. Then there is the Dumb Jock who finds it easier to be stupid and cool to be accepted. Then the Class Clown who gets acceptance by being stupid and funny. None of these people actually need to be stupid, but find life easier when they appear to be.
Stupid tends to multiply. Overbearing parents with religion thrown in, tend to have a lot of kids. These kids are raised to be like their parents. Then grow up to continue the cycle. You do the math.It's pretty damned hard for a kid to realize the trap and work their ass off in private to get out of the cycle.
So are people stupid in general? No. They are raised that way, or choose to be that way.