A persons IQ can almost be calculated just by how they live their lives.
The lower the IQ the more individuals live a life more focused on the very basic of human needs and entertainment.
The middle IQ class expands a little from their personal basic needs and has a vision expanding to get involved and help the community be a better place.
The higher class of intelligence are well beyond living a life mainly focused on basic personal needs and entertainment. They are usually compelled to constantly research and learn about every aspect of everything around them.
To answer your question more directly, yes most people lack a bigger vision and live their life basically like sheep in the mainstream america.
These type of people usually don't do much thinking of behind the scenes and just except what they're told and that's it...period...denial and ignorance is bliss...
From that angle people are dumb.