About 90% of people in the world *are* stupid.
How do you define stupid?
In my opinion there are millions of VERY intelligent people out there, exceeding in mathematics, physics, biochemistry and all other sciences... ...but yet seems to doesn't grasp the fact that following the primitive ego instincts such as aggression, fear, violence, hatred and so on... is not very intelligent...
The mind is a powerful ally, but a destructive master. Using the heart as the master evens up the balance.
But that's only my humble opinion.