Are people idiotic globally, or is it mostly the United States?

[Billandhiscats]

I once asked a similar question on Answers after observing lots of very strange questions asked coming from the USA.
I received answers to my query mostly from Americans who pointed out that the trouble was the education system which only applied to the mainly populated areas. The general opinion was that due to the size of the USA many of the areas are of a somewhat remote nature and in these areas, known as the bible belt, much of the cultural conditions including education are under the control of local 'preachers' who have considerable influence, and this was the cause of some of the very primitive current beliefs.
This was very informative to be as I certainly had no idea as to any cause, but feel obliged to take the opinion of native Americans as knowing precisely what they are talking about.