Well, it still measures relative intelligence for people with similar education, and in our globalized society our educations and exposure to information get mo

Well, it still measures relative intelligence for people with similar education, and in our globalized society our educations and exposure to information get more and more similar, so it's very good at what it's suppose to do and my guess would be that is getting even better as "cultural homogenization" in the global village increases... Now, we all know that intelligence is just a variable, it does not singly predict suitability for a certain job and it's very bad at predicting things like "success in life", but it is a useful variable!