I don't think this has to be USA-centric. Immigrating is not a small decision, or an easy one! It would be interesting to know if there is a correlation between

I don't think this has to be USA-centric. Immigrating is not a small decision, or an easy one! It would be interesting to know if there is a correlation between the willingness to do this and general creativity/ambition. I guess the flip-side would be to ask the question: Do people that stay in one place tend to become less creative or ambitious?