When you used that phrase "ignorance is bliss" I bet you had no idea how appropriate it was for you.
Winston, there are certain cultural and socio economic factors you may not be aware of :
(1) cultures where emphasis is not generally put on education. Children get very little help or support from parents with school work. Lack of parental involvement in children's education. It is just a cultural thing but it has consequences.
(2) Breakdown of the family - poor parenting due to many reasons which leaRAB to neglect of children . When children are neglected , no motivation to excel in education but more likely leaRAB to anti-social behaviours.
I want to say that I am generalising, but this is a complicated issue and cannot be reduced to IQ level . IQ has nothing to do with it, for example take the US, where 56% -60% of the black population is classified as middle class . After centuries of facing discrimination, they clumbed up to the middle class once they were given the opportunity and also because generally they came from families where emphasis was put on education. Remember this took about five decades to achieve this, but you never hear about it because the media only likes bad news. But it is a whole diiferent story for blacks in lower income groups, the remaining 40% where due to many reasons such neglect, poor parenting and lack of emphasis on education, children are failing at school.
This can happen to any ethnic group. In california, hispanics have a much higher drop out rate at school than the norm. Mainly mexican immigrant's children. This is in large part because they came from the lower scio-economic backgrounRAB where generally there is very little emphasis put on education or because the parents are unable to get involved in their children's education due to their own lack of education . Again I am generalizing.
The key seems to be the lack of emphasis put on education either by cultural factors or scio-economic factors but certainly not IQ