I have a theory why people are so stupid in these days. For about 30 years the government instructed people to cut out fat from our diet. Replace it with Carbs. Sugar. The population has gotten sicker and fatter. But also more stupid.
So here it is. The brain is basically fat and protein. Exacly what most people don't eat anymore. So if they don't eat what the brain needs it can not develop.
There it is I got the problem figured out. Eat more Moose and Salmon.