Are people who live in Melbourne, Australia more intelligent that most other people? Of course we are, hey that's why we live here. The Green Man thinks he knows why. Melbourne is an extremely racially diverse, multicultural city and recent research by Stanford Institute for Higher Education Research reveals that this does wonders for the intellect. They say

students who had more racially diverse friends and classmates tended to show even higher levels of thinking, suggesting that long-term exposure to racial diversity may be even more beneficial to higher-order thought than is immediate immersion in a diverse environment

I know the sentence is a bit long and complicated but I am sure you non-Melbournites can work it out.