Wealth Mobility...
Then you've got Wealth Equalities...
http://en.wikipedia.org/wiki/List_of_co ... e_equalityThen you've got predictive style charts like these...
http://www4.hrsdc.gc.ca/.3ndic.1t.4r@-eng.jsp?iid=54
Then you've got areas which cannot sustain Universities...
Anyways... when you are born, you have an IQ of Zero... success might have correlated with intelligence as being successful may ask more of you in terms of your brain. More exercising of the brain, more success, more IQ.
If it helps, when I was young, my IQ was through the roof. Or to be accurate, they pegged me in the 99% percentile, I rapidly dissolved that and underachieved as much as possible. So much so, that I fear IQ tests today, as really the only way from the 99% percentile, is down...
I don't accredit the smarts to my genetics, nor my rather unwitty parents, nor the TV, or my education.
My parents traveled a lot when I was young, a lot, and it opened my eyes to new, perhaps challenging environments very often.
Like when people buy their kids those fancy challenging or creative toys in the hopes to raise their IQ's. I saw beaches, strange people, strange food every day, ect...
I can just imagine a young childs IQ raising like 0.00002 points after going wide eyed seeing a fireworks display... common sense stuff like that...