Someone asked last week what Missouri is like. I think
this pretty much sums it up outside the major cities - the Ozarks being an area in the southern part of Missouri. And before you think I'm joking, while the age of marriage is nominally 18 remember that ~27 states in the US have no lower age limit on marriage where the parents/guardians or a court agree to it.
This is a train-wreck-fascinating look at it with some numbers that might surprise you.
Basically, outside the major cities, the entire country really is pretty much living in the Dark Ages socially.