Anyone who has lived in the real world knows that the conditions in which you grow up have a massive effect on where you end up. There are entire communities of people who live in deep poverty. It's not because they're all - uniformly down to the last person - dumb. The parents are poor, don't have a high-quality education, work long hours, can't afford tutoring, can't help their children with their coursework, etc.
There are entire countries trapped in poverty. China was desperately poor until just a generation ago. Did Chinese people suddenly become smart for some reason? Which is the next country that will magically go from being filled with dumb people to being filled with smart people?
As I said, just a bit of experience with the real world and critical thought will show that your explanation is nonsense.
I wasn't talking about different countries. Obviously there are issues that can hold large geographic regions down.
(Basically) no intelligent teenager in America is held down by poverty. My parents were relatively poor, didn't go to college, worked long hours, and I went to a public school and certainly didn't have any tutoring and didn't receive much help with homework.
I did well enough on my ACT to go to a private college for pretty close to free. Even if that doesn't happen you can go to a state school that doesn't need great grades, take out loans for the entire amount, get a degree for a good paying job, and suddenly you're out of poverty.
There are entire countries trapped in poverty. China was desperately poor until just a generation ago. Did Chinese people suddenly become smart for some reason? Which is the next country that will magically go from being filled with dumb people to being filled with smart people?
As I said, just a bit of experience with the real world and critical thought will show that your explanation is nonsense.